Changelog:
==========
- Optimize internal implementation for a little speedup
- Make not-full and not-empty notifications faster
- Add .aclose() async method
- Reduce notifications for a minor speedup
- Allow janus.Queue() instantiation without running asyncio event loop
- Remove sync notifiers for a major speedup
- Fix hang in AsyncQueue.join()
- Implement .shutdown(immediate=False) for both sync and async APIs
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>