Improving health after first pub.dev publication
After first publication on [pub.dev](https://pub.dev/packages/twilio_unofficial_programmable_video) some health suggestions were indicated. # What could be improved - Fix lib/src/twilio_exception.dart. (-22.95 points) ``` Analysis of lib/src/twilio_exception.dart reported 52 hints, including: line 5 col 20: Name non-constant identifiers using lowerCamelCase. line 6 col 20: Name non-constant identifiers using lowerCamelCase. line 7 col 20: Name non-constant identifiers using lowerCamelCase. line 8 col 20: Name non-constant identifiers using lowerCamelCase. line 9 col 20: Name non-constant identifiers using lowerCamelCase. ``` - Fix lib/src/local_video_track.dart. (-0.50 points) ``` Analysis of lib/src/local_video_track.dart reported 1 hint: line 64 col 107: Avoid using braces in interpolation when not needed. ``` - Fix lib/src/programmable_video.dart. (-0.50 points) ``` Analysis of lib/src/programmable_video.dart reported 1 hint: line 13 col 29: Cancel instances of dart.async.StreamSubscription. ``` - Fix additional 12 files with analysis or formatting issues. (-0.50 points) ``` Additional issues in the following files: lib/src/remote_video_track.dart (1 hint) lib/src/camera_capturer.dart (Run flutter format to format lib/src/camera_capturer.dart.) lib/src/connect_options.dart (Run flutter format to format lib/src/connect_options.dart.) lib/src/local_audio_track.dart (Run flutter format to format lib/src/local_audio_track.dart.) lib/src/local_audio_track_publication.dart (Run flutter format to format lib/src/local_audio_track_publication.dart.) lib/src/local_participant.dart (Run flutter format to format lib/src/local_participant.dart.) lib/src/local_video_track_publication.dart (Run flutter format to format lib/src/local_video_track_publication.dart.) lib/src/remote_audio_track.dart (Run flutter format to format lib/src/remote_audio_track.dart.) lib/src/remote_audio_track_publication.dart (Run flutter format to format lib/src/remote_audio_track_publication.dart.) lib/src/remote_participant.dart (Run flutter format to format lib/src/remote_participant.dart.) lib/src/remote_video_track_publication.dart (Run flutter format to format lib/src/remote_video_track_publication.dart.) lib/src/room.dart (Run flutter format to format lib/src/room.dart.) ``` # Why should this be improved To get a higher rating on pub.dev # Any risks? No # More information https://pub.dev/packages/twilio_unofficial_programmable_video#-analysis-tab- <!-- DO NOT CHANGE ANYTHING BELOW THIS LINE -->
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