[shelf_test_handler] Bump dev deps (#435)

Author: kevmoo

pkgs/shelf_test_handler/pubspec.yaml

@@ -17,6 +17,6 @@ dependencies:
 
 dev_dependencies:
   dart_flutter_team_lints: ^3.0.0
-  http: '>=0.13.0 <2.0.0'
-  shelf_web_socket: ^1.0.0
+  http: ^1.0.0
+  shelf_web_socket: ^2.0.0
   web_socket_channel: ^2.0.0