Dispose KeepAliveHandle. by @polina-c in https://github.com/flutter/flutter/pull/108227

Update docs on ChangeNotifier.dispose and KeepAliveHandle.release by @dnfield in https://github.com/flutter/flutter/pull/108384

Modify dataMap to include assertiveness only if it’s not set to polite by @nbayati in https://github.com/flutter/flutter/pull/108396

[flutter_tools] add tool support for shader hot reload by @jonahwilliams in https://github.com/flutter/flutter/pull/107963

Removed references to deprecated styleFrom parameters. by @darrenaustin in https://github.com/flutter/flutter/pull/108401

Add RenderRepaintBoundary.toImageSync() method by @tgucio in https://github.com/flutter/flutter/pull/108280