Update dependency dart to ^3.9.0

moneymgr_mobile/pubspec.yaml

@@ -19,7 +19,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.9.1
+  sdk: ^3.9.0
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

moneymgr_web/package.json

@@ -40,7 +40,7 @@
     "eslint-plugin-react-dom": "^1.52.4",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^00.4.20",
-    "eslint-plugin-react-x": "^1.52.6",
+    "eslint-plugin-react-x": "^1.52.4",
     "globals": "^16.3.0",
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.32.1",