Bump github.com/mxcl/promisekit from 6.8.5 to 6.22.1

Bumps [github.com/mxcl/promisekit](https://github.com/mxcl/PromiseKit) from 6.8.5 to 6.22.1.
- [Release notes](https://github.com/mxcl/PromiseKit/releases)
- [Commits](mxcl/PromiseKit@6.8.5...6.22.1)

---
updated-dependencies:
- dependency-name: github.com/mxcl/promisekit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Package.resolved

@@ -3,7 +3,7 @@
     {
       "identity" : "data",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/xcodereleases/data.git",
+      "location" : "https://github.com/xcodereleases/data",
       "state" : {
         "revision" : "fcf527b187817f67c05223676341f3ab69d4214d"
       }
@@ -49,8 +49,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/mxcl/PromiseKit.git",
       "state" : {
-        "revision" : "1c296a8637838901d2b01e4c46875ee749506133",
-        "version" : "6.8.5"
+        "revision" : "8a98e31a47854d3180882c8068cc4d9381bf382d",
+        "version" : "6.22.1"
       }
     },
     {

Package.swift

@@ -15,7 +15,7 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-argument-parser", .upToNextMinor(from: "1.1.4")),
         .package(url: "https://github.com/mxcl/Path.swift.git", .upToNextMinor(from: "0.16.0")),
         .package(url: "https://github.com/mxcl/Version.git", .upToNextMinor(from: "1.0.3")),
-        .package(url: "https://github.com/mxcl/PromiseKit.git", .upToNextMinor(from: "6.8.3")),
+        .package(url: "https://github.com/mxcl/PromiseKit.git", .upToNextMinor(from: "6.22.1")),
         .package(url: "https://github.com/PromiseKit/Foundation.git", .upToNextMinor(from: "3.4.0")),
         .package(url: "https://github.com/scinfu/SwiftSoup.git", .upToNextMinor(from: "2.0.0")),
         .package(url: "https://github.com/mxcl/LegibleError.git", .upToNextMinor(from: "1.0.1")),