diff --git a/Cargo.lock b/Cargo.lock
index 7210dca0d..cf9b6d29a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,14 +38,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "archive"
 version = "0.1.0"
 dependencies = [
+ "attohttpc 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "flate2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "fs-utils 0.1.0",
- "hyperx 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyperx 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "progress-read 0.1.0",
- "reqwest 0.9.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "tee 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "verbatim 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -69,6 +69,21 @@ dependencies = [
  "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "attohttpc"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "flate2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "native-tls 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.10.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.11"
@@ -84,6 +99,11 @@ name = "autocfg"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "autocfg"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "backtrace"
 version = "0.1.8"
@@ -182,13 +202,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "bytes"
-version = "0.4.12"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "bzip2"
@@ -361,32 +376,6 @@ dependencies = [
  "custom_derive 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "cookie"
-version = "0.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cookie_store"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cookie 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "publicsuffix 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "try_from 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "core-foundation"
 version = "0.6.4"
@@ -417,45 +406,6 @@ dependencies = [
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "crossbeam-deque"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-epoch 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "memoffset 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-queue"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.6.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "ctrlc"
 version = "3.1.3"
@@ -533,11 +483,6 @@ dependencies = [
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "dtoa"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "dunce"
 version = "1.0.0"
@@ -548,24 +493,11 @@ name = "either"
 version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "either"
-version = "1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "encode_unicode"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "encoding_rs"
-version = "0.8.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "envmnt"
 version = "0.8.1"
@@ -580,15 +512,6 @@ name = "envoy"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "error-chain"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "backtrace 0.3.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "failure"
 version = "0.1.5"
@@ -668,34 +591,6 @@ name = "fuchsia-cprng"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "fuchsia-zircon"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "fuchsia-zircon-sys"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "futures"
-version = "0.1.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "futures-cpupool"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "generic-array"
 version = "0.12.0"
@@ -739,23 +634,6 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "h2"
-version = "0.1.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "string 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "hamcrest2"
 version = "0.3.0"
@@ -780,92 +658,39 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "http"
-version = "0.1.17"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "http-body"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-buf 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "httparse"
 version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "hyper"
-version = "0.12.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "h2 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "http-body 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "httparse 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-buf 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-tcp 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-threadpool 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-timer 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "want 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "hyper-tls"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.12.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "native-tls 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "hyperx"
-version = "0.15.2"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "http 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "httparse 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 2.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicase 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "idna"
-version = "0.1.5"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -889,15 +714,6 @@ dependencies = [
  "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "iovec"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "itoa"
 version = "0.4.4"
@@ -937,15 +753,6 @@ name = "libc"
 version = "0.2.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "lock_api"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "owning_ref 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "lock_api"
 version = "0.2.0"
@@ -977,28 +784,12 @@ name = "memchr"
 version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "memoffset"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "mime"
 version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "unicase 2.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "mime_guess"
-version = "2.0.0-alpha.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "mime 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_codegen 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicase 2.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1029,34 +820,6 @@ dependencies = [
  "miniz_oxide 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "mio"
-version = "0.6.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "miow"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "mockito"
 version = "0.14.1"
@@ -1089,25 +852,15 @@ dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl 0.10.23 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.10.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.47 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.55 (registry+https://github.com/rust-lang/crates.io-index)",
  "schannel 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "security-framework 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "security-framework-sys 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "net2"
-version = "0.2.33"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "nix"
 version = "0.14.1"
@@ -1203,14 +956,6 @@ dependencies = [
  "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "num_cpus"
-version = "1.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "numtoa"
 version = "0.1.0"
@@ -1232,7 +977,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl"
-version = "0.10.23"
+version = "0.10.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1240,7 +985,7 @@ dependencies = [
  "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.47 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.55 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1250,14 +995,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.47"
+version = "0.9.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcpkg 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1275,23 +1020,6 @@ dependencies = [
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "owning_ref"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "parking_lot"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lock_api 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "parking_lot"
 version = "0.8.0"
@@ -1302,18 +1030,6 @@ dependencies = [
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "parking_lot_core"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "parking_lot_core"
 version = "0.5.0"
@@ -1334,6 +1050,11 @@ name = "percent-encoding"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "percent-encoding"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "pest"
 version = "2.1.1"
@@ -1373,41 +1094,6 @@ dependencies = [
  "sha-1 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "phf"
-version = "0.7.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "phf_shared 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "phf_codegen"
-version = "0.7.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "phf_generator 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_shared 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "phf_generator"
-version = "0.7.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "phf_shared 0.7.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "phf_shared"
-version = "0.7.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "siphasher 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "pkg-config"
 version = "0.3.14"
@@ -1459,18 +1145,6 @@ dependencies = [
 name = "progress-read"
 version = "0.1.0"
 
-[[package]]
-name = "publicsuffix"
-version = "1.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "error-chain 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "quote"
 version = "0.4.2"
@@ -1700,38 +1374,6 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "reqwest"
-version = "0.9.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "cookie 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cookie_store 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "encoding_rs 0.8.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "http 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper 0.12.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyper-tls 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mime 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "mime_guess 2.0.0-alpha.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "native-tls 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_urlencoded 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-threadpool 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-timer 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rgb"
 version = "0.8.13"
@@ -1777,11 +1419,6 @@ name = "scoped_threadpool"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "scopeguard"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "scopeguard"
 version = "1.0.0"
@@ -1865,17 +1502,6 @@ dependencies = [
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "serde_urlencoded"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "dtoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "sha-1"
 version = "0.8.1"
@@ -1896,34 +1522,11 @@ dependencies = [
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "siphasher"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "slab"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "smallvec"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "stable_deref_trait"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "string"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -2087,151 +1690,6 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "tokio"
-version = "0.1.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-current-thread 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-tcp 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-threadpool 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-timer 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-trace-core 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-buf"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-current-thread"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-executor"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-io"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-reactor"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-sync 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-sync"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-tcp"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-io 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-reactor 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-threadpool"
-version = "0.1.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-queue 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-timer"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "crossbeam-utils 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.27 (registry+https://github.com/rust-lang/crates.io-index)",
- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio-executor 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "tokio-trace-core"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "try-lock"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "try_from"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "typenum"
 version = "1.10.0"
@@ -2249,18 +1707,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "unicase"
-version = "1.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "unicase"
-version = "2.5.1"
+version = "2.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2309,12 +1759,12 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "1.7.2"
+version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "idna 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2331,14 +1781,6 @@ name = "utf8-ranges"
 version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "uuid"
-version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "validate-npm-package-name"
 version = "0.1.0"
@@ -2350,7 +1792,7 @@ dependencies = [
 
 [[package]]
 name = "vcpkg"
-version = "0.2.6"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2365,7 +1807,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "version_check"
-version = "0.1.5"
+version = "0.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2383,7 +1825,7 @@ dependencies = [
  "dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "envoy 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hamcrest2 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "hyperx 0.15.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hyperx 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "mockito 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2406,6 +1848,7 @@ name = "volta-core"
 version = "0.1.0"
 dependencies = [
  "archive 0.1.0",
+ "attohttpc 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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@@ -2591,15 +2023,6 @@ dependencies = [
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-[[package]]
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-
 [[package]]
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-"checksum url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"
+"checksum url 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
 "checksum user32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ef4711d107b21b410a3a974b1204d9accc8b10dad75d8324b5d755de1617d47"
 "checksum utf8-ranges 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9d50aa7650df78abf942826607c62468ce18d9019673d4a2ebe1865dbb96ffde"
-"checksum uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
-"checksum vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "def296d3eb3b12371b2c7d0e83bfe1403e4db2d7a0bba324a12b21c4ee13143d"
+"checksum vcpkg 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "3fc439f2794e98976c88a2a2dafce96b930fe8010b0a256b3c2199a773933168"
 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum verbatim 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "bbad0679079b451226e954019b2efac46bafa8f7b1418b953861e864072a97c6"
-"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
+"checksum version_check 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)" = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9658c94fa8b940eab2250bd5a457f9c48b748420d71293b165c8cdbe2f55f71e"
-"checksum want 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "797464475f30ddb8830cc529aaaae648d581f99e2036a928877dfde027ddf6b3"
 "checksum which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
@@ -2901,6 +2270,5 @@ dependencies = [
 "checksum winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef84b96d10db72dd980056666d7f1e7663ce93d82fa33b63e71c966f4cf5032"
 "checksum winfolder 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b137073183b238dc0e56dd4d77d2fc18abc6ebed8bbf4bbdb355c0f70efa3982"
 "checksum winreg 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "daf67b95d0b1bf421c4f11048d63110ca3719977169eec86396b614c8942b6e0"
-"checksum ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
 "checksum xattr 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "244c3741f4240ef46274860397c7c74e50eb23624996930e484c16679633a54c"
 "checksum zip 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "e7341988e4535c60882d5e5f0b7ad0a9a56b080ade8bdb5527cb512f7b2180e0"
diff --git a/Cargo.toml b/Cargo.toml
index 674bbd896..2f349393c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -46,6 +46,6 @@ winreg = "0.6.0"
 hamcrest2 = "0.3.0"
 envoy = "0.1.3"
 ci_info = "0.10.0"
-hyperx = "0.15.2"
+hyperx = "1.0.0"
 
 [workspace]
diff --git a/crates/archive/Cargo.toml b/crates/archive/Cargo.toml
index fcf87d323..31c9adeb7 100644
--- a/crates/archive/Cargo.toml
+++ b/crates/archive/Cargo.toml
@@ -8,7 +8,6 @@ edition = "2018"
 flate2 = "1.0"
 tar = "0.4.13"
 zip_rs = { version = "0.2.6", package = "zip" }
-reqwest = "0.9.9"
 tee = "0.1.0"
 failure = "0.1.1"
 failure_derive = "0.1.1"
@@ -16,4 +15,5 @@ fs-utils = { path = "../fs-utils" }
 progress-read = { path = "../progress-read" }
 verbatim = "0.1"
 cfg-if = "0.1"
-hyperx = "0.15.2"
+hyperx = "1.0.0"
+attohttpc = { version = "0.13.0", features = ["json"] }
diff --git a/crates/archive/src/lib.rs b/crates/archive/src/lib.rs
index 13da84ef7..8c2398bc1 100644
--- a/crates/archive/src/lib.rs
+++ b/crates/archive/src/lib.rs
@@ -9,7 +9,7 @@ use failure::Fail;
 #[derive(Fail, Debug)]
 #[fail(display = "HTTP failure ({})", code)]
 pub struct HttpError {
-    pub code: ::reqwest::StatusCode,
+    pub code: ::attohttpc::StatusCode,
 }
 
 pub use crate::tarball::Tarball;
diff --git a/crates/archive/src/tarball.rs b/crates/archive/src/tarball.rs
index 5e8bd7e68..4484ea66b 100644
--- a/crates/archive/src/tarball.rs
+++ b/crates/archive/src/tarball.rs
@@ -5,6 +5,7 @@ use std::fs::File;
 use std::io::{Read, Seek, SeekFrom};
 use std::path::Path;
 
+use attohttpc::header::HeaderMap;
 use failure::{self, Fail};
 use flate2::read::GzDecoder;
 use fs_utils::ensure_containing_dir_exists;
@@ -12,7 +13,6 @@ use hyperx::header::{
     AcceptRanges, ByteRangeSpec, ContentLength, Header, Range, RangeUnit, TypedHeaders,
 };
 use progress_read::ProgressRead;
-use reqwest::Response;
 use tee::TeeReader;
 
 use super::Archive;
@@ -38,9 +38,8 @@ struct MissingHeaderError {
 
 /// Determines the length of an HTTP response's content in bytes, using
 /// the HTTP `"Content-Length"` header.
-fn content_length(response: &Response) -> Result<u64, failure::Error> {
-    response
-        .headers()
+fn content_length(headers: &HeaderMap) -> Result<u64, failure::Error> {
+    headers
         .decode::<ContentLength>()
         .ok()
         .map(|v| v.0)
@@ -69,17 +68,14 @@ impl Tarball {
     /// tarball that can be streamed (and that tees its data to a local
     /// file as it streams).
     pub fn fetch(url: &str, cache_file: &Path) -> Result<Box<dyn Archive>, failure::Error> {
-        let response = reqwest::get(url)?;
+        let (status, headers, response) = attohttpc::get(url).send()?.split();
 
-        if !response.status().is_success() {
-            return Err(super::HttpError {
-                code: response.status(),
-            }
-            .into());
+        if !status.is_success() {
+            return Err(super::HttpError { code: status }.into());
         }
 
-        let compressed_size = content_length(&response)?;
-        let uncompressed_size = if accepts_byte_ranges(&response) {
+        let compressed_size = content_length(&headers)?;
+        let uncompressed_size = if accepts_byte_ranges(&headers) {
             fetch_uncompressed_size(url, compressed_size)
         } else {
             None
@@ -151,21 +147,17 @@ struct UnexpectedContentLengthError {
 /// downloading the entire gzip file. For very small files it's unlikely to be
 /// more efficient than simply downloading the entire file up front.
 fn fetch_isize(url: &str, len: u64) -> Result<[u8; 4], failure::Error> {
-    let client = reqwest::Client::new();
     let range_header = Range::Bytes(vec![ByteRangeSpec::FromTo(len - 4, len - 1)]);
-    let mut response = client
-        .get(url)
+    let (status, headers, mut response) = attohttpc::get(url)
         .header(Range::header_name(), range_header.to_string())
-        .send()?;
+        .send()?
+        .split();
 
-    if !response.status().is_success() {
-        return Err(super::HttpError {
-            code: response.status(),
-        }
-        .into());
+    if !status.is_success() {
+        return Err(super::HttpError { code: status }.into());
     }
 
-    let actual_length = content_length(&response)?;
+    let actual_length = content_length(&headers)?;
 
     if actual_length != 4 {
         return Err(UnexpectedContentLengthError {
@@ -189,9 +181,8 @@ fn load_isize(file: &mut File) -> Result<[u8; 4], failure::Error> {
     Ok(buf)
 }
 
-fn accepts_byte_ranges(response: &Response) -> bool {
-    response
-        .headers()
+fn accepts_byte_ranges(headers: &HeaderMap) -> bool {
+    headers
         .decode::<AcceptRanges>()
         .ok()
         .map(|v| v.iter().any(|unit| *unit == RangeUnit::Bytes))
diff --git a/crates/archive/src/zip.rs b/crates/archive/src/zip.rs
index 31a55ce93..a5a80b063 100644
--- a/crates/archive/src/zip.rs
+++ b/crates/archive/src/zip.rs
@@ -33,13 +33,10 @@ impl Zip {
     /// Initiate fetching of a Node zip archive from the given URL, returning
     /// a `Remote` data source.
     pub fn fetch(url: &str, cache_file: &Path) -> Result<Box<dyn Archive>, failure::Error> {
-        let mut response = reqwest::get(url)?;
+        let (status, _, mut response) = attohttpc::get(url).send()?.split();
 
-        if !response.status().is_success() {
-            return Err(super::HttpError {
-                code: response.status(),
-            }
-            .into());
+        if !status.is_success() {
+            return Err(super::HttpError { code: status }.into());
         }
 
         {
diff --git a/crates/volta-core/Cargo.toml b/crates/volta-core/Cargo.toml
index e3a99e454..fc7d9eab9 100644
--- a/crates/volta-core/Cargo.toml
+++ b/crates/volta-core/Cargo.toml
@@ -28,7 +28,6 @@ lazycell = "1.2.0"
 lazy_static = "1.3.0"
 semver = { git = "https://github.com/mikrostew/semver", branch = "new-parser" }
 cmdline_words_parser = "0.0.2"
-reqwest = "0.9.9"
 fs-utils = { path = "../fs-utils" }
 cfg-if = "0.1"
 winfolder = "0.1"
@@ -52,7 +51,8 @@ volta-layout = { path = "../volta-layout" }
 double-checked-cell = "2.0.2"
 dunce = "1.0.0"
 ci_info = "0.10.0"
-hyperx = "0.15.2"
+hyperx = "1.0.0"
+attohttpc = { version = "0.13.0", features = ["json"] }
 
 [target.'cfg(windows)'.dependencies]
 winreg = "0.6.0"
diff --git a/crates/volta-core/src/tool/mod.rs b/crates/volta-core/src/tool/mod.rs
index 0853501d6..6374bec63 100644
--- a/crates/volta-core/src/tool/mod.rs
+++ b/crates/volta-core/src/tool/mod.rs
@@ -141,7 +141,7 @@ fn download_tool_error(
 fn registry_fetch_error(
     tool: impl AsRef<str>,
     from_url: impl AsRef<str>,
-) -> impl FnOnce(&reqwest::Error) -> ErrorDetails {
+) -> impl FnOnce(&attohttpc::Error) -> ErrorDetails {
     let tool = tool.as_ref().to_string();
     let from_url = from_url.as_ref().to_string();
     |_| ErrorDetails::RegistryFetchError { tool, from_url }
diff --git a/crates/volta-core/src/tool/node/resolve.rs b/crates/volta-core/src/tool/node/resolve.rs
index 2696e5340..c585a651b 100644
--- a/crates/volta-core/src/tool/node/resolve.rs
+++ b/crates/volta-core/src/tool/node/resolve.rs
@@ -16,6 +16,7 @@ use crate::session::Session;
 use crate::style::progress_spinner;
 use crate::tool::Node;
 use crate::version::{VersionSpec, VersionTag};
+use attohttpc::Response;
 use cfg_if::cfg_if;
 use fs_utils::ensure_containing_dir_exists;
 use hyperx::header::{CacheControl, CacheDirective, Expires, HttpDate, TypedHeaders};
@@ -247,8 +248,8 @@ fn read_cached_opt(url: &str) -> Fallible<Option<serial::RawNodeIndex>> {
 }
 
 /// Get the cache max-age of an HTTP reponse.
-fn max_age(response: &reqwest::Response) -> u32 {
-    if let Ok(cache_control_header) = response.headers().decode::<CacheControl>() {
+fn max_age(headers: &attohttpc::header::HeaderMap) -> u32 {
+    if let Ok(cache_control_header) = headers.decode::<CacheControl>() {
         for cache_directive in cache_control_header.iter() {
             if let CacheDirective::MaxAge(max_age) = cache_directive {
                 return *max_age;
@@ -270,11 +271,16 @@ fn resolve_node_versions(url: &str) -> Fallible<serial::RawNodeIndex> {
             debug!("Node index cache was not found or was invalid");
             let spinner = progress_spinner(&format!("Fetching public registry: {}", url));
 
-            let mut response: reqwest::Response =
-                reqwest::get(url).with_context(registry_fetch_error("Node", url))?;
+            let (_, headers, response) = attohttpc::get(url)
+                .send()
+                .and_then(Response::error_for_status)
+                .with_context(registry_fetch_error("Node", url))?
+                .split();
+
             let response_text = response
                 .text()
                 .with_context(registry_fetch_error("Node", url))?;
+
             let index: serial::RawNodeIndex = serde_json::de::from_str(&response_text)
                 .with_context(|_| ErrorDetails::ParseNodeIndexError {
                     from_url: url.to_string(),
@@ -304,11 +310,10 @@ fn resolve_node_versions(url: &str) -> Fallible<serial::RawNodeIndex> {
             let expiry = create_staging_file()?;
             let mut expiry_file: &File = expiry.as_file();
 
-            let result = if let Ok(expires_header) = response.headers().decode::<Expires>() {
+            let result = if let Ok(expires_header) = headers.decode::<Expires>() {
                 write!(expiry_file, "{}", expires_header)
             } else {
-                let expiry_date =
-                    SystemTime::now() + Duration::from_secs(max_age(&response).into());
+                let expiry_date = SystemTime::now() + Duration::from_secs(max_age(&headers).into());
 
                 write!(expiry_file, "{}", HttpDate::from(expiry_date))
             };
diff --git a/crates/volta-core/src/tool/npm/resolve.rs b/crates/volta-core/src/tool/npm/resolve.rs
index 674266948..8da4e6997 100644
--- a/crates/volta-core/src/tool/npm/resolve.rs
+++ b/crates/volta-core/src/tool/npm/resolve.rs
@@ -8,10 +8,10 @@ use crate::style::progress_spinner;
 use crate::tool::package;
 use crate::tool::Npm;
 use crate::version::{VersionSpec, VersionTag};
+use attohttpc::header::ACCEPT;
+use attohttpc::Response;
 use cfg_if::cfg_if;
 use log::debug;
-use reqwest::header::ACCEPT;
-use reqwest::Client;
 use semver::{Version, VersionReq};
 use volta_fail::{Fallible, ResultExt};
 
@@ -60,12 +60,11 @@ fn fetch_npm_index(
     };
 
     let spinner = progress_spinner(&format!("Fetching public registry: {}", url));
-    let http_client = Client::new();
-    let metadata: package::serial::RawPackageMetadata = http_client
-        .get(&url)
+    let metadata: package::serial::RawPackageMetadata = attohttpc::get(&url)
         .header(ACCEPT, NPM_ABBREVIATED_ACCEPT_HEADER)
         .send()
-        .and_then(|mut resp| resp.json())
+        .and_then(Response::error_for_status)
+        .and_then(Response::json)
         .with_context(registry_fetch_error("npm", &url))?;
 
     spinner.finish_and_clear();
diff --git a/crates/volta-core/src/tool/package/resolve.rs b/crates/volta-core/src/tool/package/resolve.rs
index a58fa1473..ba9a26b28 100644
--- a/crates/volta-core/src/tool/package/resolve.rs
+++ b/crates/volta-core/src/tool/package/resolve.rs
@@ -10,6 +10,7 @@ use crate::session::Session;
 use crate::style::{progress_spinner, tool_version};
 use crate::tool::PackageDetails;
 use crate::version::{VersionSpec, VersionTag};
+use attohttpc::{ErrorKind, Response, StatusCode};
 use log::debug;
 use semver::{Version, VersionReq};
 use volta_fail::{throw, Fallible, ResultExt};
@@ -191,11 +192,12 @@ fn resolve_package_metadata(
     package_info_url: &str,
 ) -> Fallible<super::serial::RawPackageMetadata> {
     let spinner = progress_spinner(&format!("Fetching package metadata: {}", package_info_url));
-    let response_text = reqwest::get(package_info_url)
-        .and_then(|resp| resp.error_for_status())
-        .and_then(|mut resp| resp.text())
-        .with_context(|err| match err.status() {
-            Some(reqwest::StatusCode::NOT_FOUND) => ErrorDetails::PackageNotFound {
+    let response_text = attohttpc::get(package_info_url)
+        .send()
+        .and_then(Response::error_for_status)
+        .and_then(Response::text)
+        .with_context(|err| match err.kind() {
+            ErrorKind::StatusCode(StatusCode::NOT_FOUND) => ErrorDetails::PackageNotFound {
                 package: package_name.into(),
             },
             _ => ErrorDetails::PackageMetadataFetchError {
diff --git a/crates/volta-core/src/tool/yarn/resolve.rs b/crates/volta-core/src/tool/yarn/resolve.rs
index 94f3bc226..a2c6a27d6 100644
--- a/crates/volta-core/src/tool/yarn/resolve.rs
+++ b/crates/volta-core/src/tool/yarn/resolve.rs
@@ -10,6 +10,7 @@ use crate::session::Session;
 use crate::style::progress_spinner;
 use crate::tool::Yarn;
 use crate::version::{parse_version, VersionSpec, VersionTag};
+use attohttpc::Response;
 use cfg_if::cfg_if;
 use log::debug;
 use semver::{Version, VersionReq};
@@ -60,8 +61,10 @@ fn resolve_latest(hooks: Option<&ToolHooks<Yarn>>) -> Fallible<Version> {
         }
         _ => public_yarn_latest_version(),
     };
-    let response_text = reqwest::get(&url)
-        .and_then(|mut resp| resp.text())
+    let response_text = attohttpc::get(&url)
+        .send()
+        .and_then(Response::error_for_status)
+        .and_then(Response::text)
         .with_context(|_| ErrorDetails::YarnLatestFetchError {
             from_url: url.clone(),
         })?;
@@ -83,8 +86,10 @@ fn resolve_semver(matching: VersionReq, hooks: Option<&ToolHooks<Yarn>>) -> Fall
     };
 
     let spinner = progress_spinner(&format!("Fetching public registry: {}", url));
-    let releases: serial::RawYarnIndex = reqwest::get(&url)
-        .and_then(|mut resp| resp.json())
+    let releases: serial::RawYarnIndex = attohttpc::get(&url)
+        .send()
+        .and_then(Response::error_for_status)
+        .and_then(Response::json)
         .with_context(registry_fetch_error("Yarn", &url))?;
     let index = YarnIndex::from(releases);
     let releases = index.entries;