Bump shelf_web_socket from 1.0.4 to 2.0.0 (#22)

Bumps [shelf_web_socket](https://github.com/dart-lang/shelf/tree/master/pkgs) from 1.0.4 to 2.0.0.
- [Release notes](https://github.com/dart-lang/shelf/releases)
- [Commits](https://github.com/dart-lang/shelf/commits/shelf_test_handler-v2.0.0/pkgs)

---
updated-dependencies:
- dependency-name: shelf_web_socket
  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>

pubspec.lock

@@ -261,10 +261,10 @@ packages:
     dependency: "direct main"
     description:
       name: shelf_web_socket
-      sha256: "9ca081be41c60190ebcb4766b2486a7d50261db7bd0f5d9615f2d653637a84c1"
+      sha256: "073c147238594ecd0d193f3456a5fe91c4b0abbcc68bf5cd95b36c4e194ac611"
       url: "https://pub.dev"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.0"
   source_map_stack_trace:
     dependency: transitive
     description: