[audiofileplayer] Build warning on Flutter 3.0.0

[gilescm]

When building an app with Flutter version 3.0.0 or above that uses the audiofileplayer package I am seeing the warnings below. Could a new version on pub.dev be published that makes this package compatible with Flutter 3.0.0 please?

../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:248:20: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
    WidgetsBinding.instance!.addObserver(this);
                   ^
../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:257:20: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
    WidgetsBinding.instance!.addObserver(this);
                   ^
../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:267:20: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
    WidgetsBinding.instance!.addObserver(this);
                   ^
../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:276:20: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
    WidgetsBinding.instance!.addObserver(this);
                   ^
../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:480:22: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
      WidgetsBinding.instance!.removeObserver(this);
                     ^
../../../../Library/flutter/.pub-cache/hosted/pub.dartlang.org/audiofileplayer-2.1.0/lib/audiofileplayer.dart:705:22: Warning: Operand of null-aware operation '!' has type
'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../../../Library/flutter/packages/flutter/lib/src/widgets/binding.dart').
      WidgetsBinding.instance!.removeObserver(playingAudio);