Bump http from 1.5.0 to 1.6.0

Bumps [http](https://github.com/dart-lang/http/tree/master/pkgs) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/dart-lang/http/releases)
- [Commits](https://github.com/dart-lang/http/commits/HEAD/pkgs)

---
updated-dependencies:
- dependency-name: http
  dependency-version: 1.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pubspec.lock

@@ -141,10 +141,10 @@ packages:
     dependency: "direct main"
     description:
       name: http
-      sha256: bb2ce4590bc2667c96f318d68cac1b5a7987ec819351d32b1c987239a815e007
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
       url: "https://pub.dev"
     source: hosted
-    version: "1.5.0"
+    version: "1.6.0"
   http_multi_server:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
   frontend_server_client: ^4.0.0
   glob: ^2.1.3
   graphs: ^2.3.2
-  http: ^1.5.0
+  http: ^1.6.0
   http_multi_server: ^3.2.2
   http_parser: ^4.1.2
   meta: ^1.17.0