flutter_speed_dial 6.3.0 issues

[vasilich6107]

With flutter_speed_dial: ^6.3.0 pub get install and bumps everything from v6.
Please respect semantic versioning pattern and bump major version if you release for Next flutter release

Otherwise users have errors

/github/home/.pub-cache/hosted/pub.dartlang.org/flutter_speed_dial-6.3.0/lib/src/speed_dial.dart:360:53: Error: Method 'insert' cannot be called on 'OverlayState?' because it is potentially null.
 - 'OverlayState' is from 'package:flutter/src/widgets/overlay.dart' ('/sdks/flutter/packages/flutter/lib/src/widgets/overlay.dart').
Try calling using ?. instead.
      if (widget.renderOverlay) Overlay.of(context).insert(backgroundOverlay!);

[prateekmedia]

Resolved, will take care of this in the future versions too.