Seaplayer-audio

- Add streamer `AsyncCallbackSoundDeviceStreamer`
- Update README.md
- Removed the check for the beginning of `StreamerState.LOCKED` in streamer cycles
- Fixed incorrect allocation of an ndarray of zeros
- Fixed places where an exception can occur
- Fixed an illogic in the `is_busy() -> bool` functions
- Fixed a synchronous context manager bug inside asynchronous classes
- Fixed the lack of queue asynchrony inside asynchronous classes

**Full Changelog**: https://github.com/romanin-rf/seaplayer-audio/compare/0.1.21...0.2.0

New Contributors
* romanin-rf made their first contribution in https://github.com/romanin-rf/seaplayer-audio/pull/1

**Full Changelog**: https://github.com/romanin-rf/seaplayer-audio/commits/0.1.21