chore: Bump sdk to ^3.9.0

Author: nielsenko

mcp_examples/pubspec.yaml

@@ -5,7 +5,7 @@ version: 0.0.1
 
 resolution: workspace
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.9.0
 
 dependencies:
   args: ^2.7.0

pkgs/dart_mcp/pubspec.yaml

@@ -6,7 +6,7 @@ issue_tracker: https://github.com/dart-lang/ai/issues?q=is%3Aissue+is%3Aopen+lab
 
 resolution: workspace
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.9.0
 
 dependencies:
   async: ^2.13.0

pkgs/dart_mcp_server/pubspec.yaml

@@ -5,7 +5,7 @@ description: >-
 publish_to: none
 resolution: workspace
 environment:
-  sdk: ^3.9.0-163.0.dev
+  sdk: ^3.9.0
 
 executables:
   dart_mcp_server: main

pkgs/dart_mcp_server/test_fixtures/counter_app/pubspec.yaml

@@ -5,7 +5,7 @@ version: 0.1.0-wip
 
 resolution: workspace
 environment:
-  sdk: ^3.6.1
+  sdk: ^3.9.0
 
 dependencies:
   cupertino_icons: ^1.0.8

pkgs/dart_mcp_server/test_fixtures/dart_cli_app/pubspec.yaml

@@ -2,4 +2,4 @@ name: example_dart_cli_app
 publish_to: none
 resolution: workspace
 environment:
-  sdk: ^3.7.0
+  sdk: ^3.9.0

pubspec.yaml

@@ -2,7 +2,7 @@ name: _
 publish_to: none
 
 environment:
-  sdk: ^3.6.1
+  sdk: ^3.9.0
 
 workspace:
   - mcp_examples/