chore(build): remove all of the go1.12 references from build

.circleci/config.yml

@@ -7,7 +7,7 @@ jobs:
       docker_layer_caching: true
     environment:
       - PARALLELISM: 4 # Input to influxdb/build.py
-    parallelism: 5 # How many CircleCI test containers
+    parallelism: 4 # How many CircleCI test containers
     steps:
       - checkout
       - run:

CONTRIBUTING.md

@@ -69,22 +69,16 @@ second to sign our CLA, which can be found
 
 Installing Go
 -------------
-InfluxDB requires Go 1.12.
+InfluxDB requires Go 1.13
 
 At InfluxDB we find gvm, a Go version manager, useful for installing Go. For instructions
 on how to install it see [the gvm page on github](https://github.com/moovweb/gvm).
 
 After installing gvm you can install and set the default go version by
 running the following:
 
-    gvm install go1.12
-    gvm use go1.12 --default
-
-Installing Dep
--------------
-InfluxDB uses [dep](https://github.com/golang/dep) to manage dependencies.  Install it by running the following:
-
-    go get github.com/golang/dep/cmd/dep
+    gvm install go1.13
+    gvm use go1.13 --default
 
 Revision Control Systems
 -------------
@@ -122,13 +116,7 @@ Retaining the directory structure `$GOPATH/src/github.com/influxdata` is necessa
 Build and Test
 -----
 
-Make sure you have Go installed and the project structure as shown above. To then get the dependencies for the project, execute the following commands:
-
-```bash
-cd $GOPATH/src/github.com/influxdata/influxdb
-dep ensure
-```
-
+Make sure you have Go installed and the project structure as shown above.
 To then build and install the binaries, run the following command.
 ```bash
 go clean ./...

Dockerfile_jenkins_ubuntu32

@@ -11,7 +11,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
 # Install go
 ENV GOCACHE=/tmp
 ENV GOPATH /go
-ENV GO_VERSION 1.12
+ENV GO_VERSION 1.13
 ENV GO_ARCH 386
 RUN wget --no-verbose -q https://storage.googleapis.com/golang/go${GO_VERSION}.linux-${GO_ARCH}.tar.gz && \
    tar -C /usr/local/ -xf /go${GO_VERSION}.linux-${GO_ARCH}.tar.gz && \

test.sh

@@ -9,7 +9,6 @@
 #      1: race enabled 64bit tests
 #      2: normal 32bit tests
 #      3: tsi build
-#      4: go 1.12
 #      count: print the number of test environments
 #      *: to run all tests in parallel containers
 #
@@ -32,7 +31,7 @@ TIMEOUT=${TIMEOUT-1500s}
 DOCKER_RM=${DOCKER_RM-true}
 
 # Update this value if you add a new test environment.
-ENV_COUNT=5
+ENV_COUNT=4
 
 # Default return code 0
 rc=0
@@ -123,11 +122,6 @@ case $ENVIRONMENT_INDEX in
         run_test_docker Dockerfile_build_ubuntu64 test_64bit --test --junit-report
         rc=$?
         ;;
-    4)
-        # go1.12
-        run_test_docker Dockerfile_build_ubuntu64_go1.12 test_64bit --test --junit-report
-        rc=$?
-        ;;
     "count")
         echo $ENV_COUNT
         ;;