chore: Tighten constraints

Author: nielsenko

mcp_examples/pubspec.yaml

@@ -11,7 +11,7 @@ dependencies:
   args: ^2.7.0
   async: ^2.13.0
   cli_util: ^0.4.2
-  dart_mcp: ^0.3.0
+  dart_mcp: ^0.3.4-wip
   google_generative_ai: ^0.4.7
   path: ^1.9.1
   stream_channel: ^2.1.4

pkgs/dart_mcp/pubspec.yaml

@@ -11,11 +11,11 @@ environment:
 dependencies:
   async: ^2.13.0
   collection: ^1.19.1
-  json_rpc_2: ">=3.0.3 <5.0.0"
+  json_rpc_2: ^4.0.0
   meta: ^1.16.0
   stream_channel: ^2.1.4
   stream_transform: ^2.1.1
 
 dev_dependencies:
   dart_flutter_team_lints: ^3.2.1
-  test: ^1.25.15
+  test: ^1.26.1

pkgs/dart_mcp_server/pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
   args: ^2.7.0
   async: ^2.13.0
   collection: ^1.19.1
-  dart_mcp: ^0.3.3
+  dart_mcp: ^0.3.4-wip
   dds_service_extensions: ^2.0.1
   devtools_shared: ^12.0.0
   dtd: ^4.0.0
@@ -44,6 +44,6 @@ dev_dependencies:
   analyzer: ^7.5.2
   dart_flutter_team_lints: ^3.2.1
   pub_semver: ^2.2.0
-  test: ^1.25.15
+  test: ^1.26.1
   test_descriptor: ^2.0.2
   test_process: ^2.1.1