Asyncio-mqtt

Added

- Add type hints. Contributed by [Ellis Percival (flyte)](https://github.com/flyte) [#37](https://github.com/sbtinstruments/asyncio-mqtt/pull/37)

- Add the `keepalive`, `bind_address`, `bind_port`, `clean_start`, `properties` arguments. Contributed by [Marcin Jaworski (yawor)](https://github.com/yawor) in [#56](https://github.com/sbtinstruments/asyncio-mqtt/pull/56)

Fixed

- Fix Python 3.6 compatibility. Contributed by [(fipwmaqzufheoxq92ebc)](https://github.com/fipwmaqzufheoxq92ebc) in [#57](https://github.com/sbtinstruments/asyncio-mqtt/pull/57).
Note that asyncio-mqtt officially targets Python 3.7. Compatibility with 3.6 is community-driven.

- Fix "Broken pipe" error. Contributed by [Gilbert (gilbertsmink)](https://github.com/gilbertsmink) in [#55](https://github.com/sbtinstruments/asyncio-mqtt/pull/55)

- Fix socket check when you select the WebSocket transport. Contributed by [Robert Chmielowiec (chmielowiec)](https://github.com/chmielowiec) in [#54](https://github.com/sbtinstruments/asyncio-mqtt/pull/54)

- Fix `TypeError` on invalid username and password combination

- Check that _misc_task is not None before trying to cancel it. Contributed by [Ellis Percival (flyte)](https://github.com/flyte) in [#41](https://github.com/sbtinstruments/asyncio-mqtt/pull/41)

- Fix exception in `on_socket_open`: Non-thread-safe operation invoked on an event loop other than the current one. Contributed by [Ellis Percival (flyte)](https://github.com/flyte) in [#40](https://github.com/sbtinstruments/asyncio-mqtt/pull/40)

Fixed

- Fix `AttributeError` when you use WebSockets.
Contributed by [Robert Chmielowiec (chmielowiec)](https://github.com/chmielowiec) in [#36](https://github.com/sbtinstruments/asyncio-mqtt/pull/36)

- Fix `asyncio.InvalidStateError` in the `_on_connect` callback.
Contributed by [Maxim Shmalovsky (vitalalerter)](https://github.com/vitalalerter) in [#31](https://github.com/sbtinstruments/asyncio-mqtt/pull/31)

- Fix "Future exception was never retrieved" on disconnect.
Contributed by [Martin Hjelmare (martinhjelmare)](https://github.com/martinhjelmare) in [#25](https://github.com/sbtinstruments/asyncio-mqtt/pull/25)

- Fix `connect` so it no longer blocks the event loop.
Contributed by [Øystein Haug Olsen (oholsen)](https://github.com/oholsen) in [#23](https://github.com/sbtinstruments/asyncio-mqtt/pull/23)

Added

- Add `transport` argument to `Client`
Contributed by [opengs](https://github.com/opengs) in [#21](https://github.com/sbtinstruments/asyncio-mqtt/pull/21)
- Add `clean_session` argument to `Client`
Contributed by [nadyka](https://github.com/madnadyka) in [#17](https://github.com/sbtinstruments/asyncio-mqtt/pull/17)

I've tested the library for production use at SBT Instruments. This uncovered a bunch of bugs and missing features that I've adressed in this release. We are approaching a 1.0.0 release. Let me know if you want something changed before that via the issue tracker on GitHub.

Added
- Add support for MQTTv5.
- Add `will` keyword argument to `Client`.
- Add `MqttConnectError` with specific error messages for connection failures.
- Add `Client.id` property that returns the client ID (or `None` if the client ID was not specified during construction).

Fixed
- Fix unhandled exception error.
- Fix "Task was destroyed but it is pending" error.
- Fix compatibility with `asyncqt`'s event loop.
- Fix race condition in `Client.connect` that raised an `AttributeError`.
- Fix "[asyncio] Future exception was never retrieved" debug message.
- Fix support for python 3.6. Contributed by [Derrick Lyndon Pallas (pallas)](https://github.com/pallas) in [#12](https://github.com/sbtinstruments/asyncio-mqtt/pull/12)