Bump http from 0.13.6 to 1.0.0 (#3421)

Bumps [http](https://github.com/dart-lang/http/tree/master/pkgs) from 0.13.6 to 1.0.0.
- [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-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pubspec.yaml

@@ -34,7 +34,7 @@ dev_dependencies:
   coverage: ^1.6.3
   dart_style: ^2.3.1
   grinder: ^0.9.4
-  http: ^0.13.6
+  http: ">=0.13.6 <2.0.0"
   js: ^0.6.7
   lints: ^2.1.0
   matcher: ^0.12.15