chore(deps): update dependency dart to v3

Author: renovate[bot]

auto_route/example/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: '>=2.19.6 <3.0.0'
+  sdk: '<4.0.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

logify/example/pubspec.yaml

@@ -3,7 +3,7 @@ description: Logger Plus example
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '<4.0.0'
 
 dependencies:
   logging: ^1.1.1