set dart sdk to > 3.5.0

Author: TimHoogstrate

google_api_availability/example/pubspec.yaml

@@ -4,7 +4,7 @@ version: 1.0.0+1
 publish_to: none
 
 environment:
-  sdk: ">=2.15.0 <4.0.0"
+  sdk: ^3.5.0
 
 dependencies:
   flutter:

google_api_availability/pubspec.yaml

@@ -4,7 +4,7 @@ version: 5.0.1
 homepage: https://github.com/baseflowit/flutter-google-api-availability
 
 environment:
-  sdk: '>=2.15.0 <4.0.0'
+  sdk: ^3.5.0
   flutter: ">=2.8.1"
 
 dependencies:

google_api_availability_platform_interface/pubspec.yaml

@@ -18,5 +18,5 @@ dev_dependencies:
   mockito: ^5.3.2
 
 environment:
-  sdk: ">=2.15.0 <4.0.0"
+  sdk: ^3.5.0
   flutter: ">=2.8.0"