Update dependencies (#170)

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Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/swift-server/async-http-client.git",
         "state": {
           "branch": null,
-          "revision": "4b4d6605aa2e4f0c2ae3c7563795ae3bec259fff",
-          "version": "1.2.1"
+          "revision": "0a8dddbe15cd72f7bb5e47951fb7c1eb0836dfc2",
+          "version": "1.2.2"
         }
       },
       {
@@ -51,8 +51,8 @@
         "repositoryURL": "https://github.com/JohnSundell/Splash.git",
         "state": {
           "branch": null,
-          "revision": "f25dd8c9f16be1f81a152f6861d7216c3c9302da",
-          "version": "0.14.0"
+          "revision": "81de0389558ad40579027735841593b21a511fa8",
+          "version": "0.15.0"
         }
       },
       {
@@ -96,8 +96,8 @@
         "repositoryURL": "https://github.com/apple/swift-metrics.git",
         "state": {
           "branch": null,
-          "revision": "f5ed78cb26019b2b85b016f8aa5b1a3427c8251a",
-          "version": "2.1.0"
+          "revision": "e382458581b05839a571c578e90060fff499f101",
+          "version": "2.1.1"
         }
       },
       {