Breaking changes
- remove kwargs from the return value of `event()` (1)
New features
- `sleep_forever()` waits forever
- `and_()` and `or_()` waits for the completion of multiple coroutines
- `all_touch_moves()` handles `on_touch_move` via async-for
- `animation()` an async version of `kivy.animation.Animation`
- `process_and_thread` waits for the completion of another thread/subprocess