Update for Flutter 3.10 beta (#1746)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.

---------

Co-authored-by: David Iglesias <ditman@gmail.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: John Ryan <ryjohn@google.com>

game_template/lib/src/audio/audio_controller.dart

@@ -156,12 +156,10 @@ class AudioController {
       case AppLifecycleState.paused:
       case AppLifecycleState.detached:
         _stopAllSound();
-        break;
       case AppLifecycleState.resumed:
         if (!_settings!.muted.value && _settings!.musicOn.value) {
           _resumeMusic();
         }
-        break;
       case AppLifecycleState.inactive:
         // No need to react to this state change.
         break;
@@ -209,23 +207,19 @@ class AudioController {
           _log.severe(e);
           await _playFirstSongInPlaylist();
         }
-        break;
       case PlayerState.stopped:
         _log.info("resumeMusic() called when music is stopped. "
             "This probably means we haven't yet started the music. "
             "For example, the game was started with sound off.");
         await _playFirstSongInPlaylist();
-        break;
       case PlayerState.playing:
         _log.warning('resumeMusic() called when music is playing. '
             'Nothing to do.');
-        break;
       case PlayerState.completed:
         _log.warning('resumeMusic() called when music is completed. '
             "Music should never be 'completed' as it's either not playing "
             "or looping forever.");
         await _playFirstSongInPlaylist();
-        break;
     }
   }
 

game_template/lib/src/in_app_purchase/in_app_purchase.dart

@@ -139,7 +139,6 @@ class InAppPurchaseController extends ChangeNotifier {
         case PurchaseStatus.pending:
           _adRemoval = const AdRemovalPurchase.pending();
           notifyListeners();
-          break;
         case PurchaseStatus.purchased:
         case PurchaseStatus.restored:
           bool valid = await _verifyPurchase(purchaseDetails);
@@ -155,16 +154,13 @@ class InAppPurchaseController extends ChangeNotifier {
                 StateError('Purchase could not be verified'));
             notifyListeners();
           }
-          break;
         case PurchaseStatus.error:
           _log.severe('Error with purchase: ${purchaseDetails.error}');
           _adRemoval = AdRemovalPurchase.error(purchaseDetails.error!);
           notifyListeners();
-          break;
         case PurchaseStatus.canceled:
           _adRemoval = const AdRemovalPurchase.notStarted();
           notifyListeners();
-          break;
       }
 
       if (purchaseDetails.pendingCompletePurchase) {

game_template/lib/src/style/my_transition.dart

@@ -110,14 +110,12 @@ class _MyRevealState extends State<_MyReveal> {
         setState(() {
           _finished = true;
         });
-        break;
       case AnimationStatus.forward:
       case AnimationStatus.dismissed:
       case AnimationStatus.reverse:
         setState(() {
           _finished = false;
         });
-        break;
     }
   }
 }

game_template/pubspec.yaml

@@ -7,7 +7,7 @@ publish_to: 'none'
 version: 0.0.1+1
 
 environment:
-  sdk: '>=2.19.5 <4.0.0'
+  sdk: ^3.0.0-0
 
 dependencies:
   flutter: