Changed
- Drop support for Python 3.7. Contributed by [Felix Böhm (empicano)](https://github.com/empicano) in [#246](https://github.com/sbtinstruments/aiomqtt/pull/246)
Fixed
- Fix `__aenter__` failing to release lock when initial connection fails. Contributed by [Peanut (vvanglro)](https://github.com/vvanglro) in [#245](https://github.com/sbtinstruments/aiomqtt/pull/245)