Pytest-mqtt

What's Changed

* Fix improving error handling when Docker daemon is not running.


**Full Changelog**: https://github.com/mqtt-tools/pytest-mqtt/compare/0.3.0...0.3.1

What's Changed
- Improve error handling when Docker daemon is not running. Thanks, horta.

**Full Changelog**: https://github.com/mqtt-tools/pytest-mqtt/compare/0.2.0...0.3.0

What's Changed
- Mosquitto fixture: Add missing ``port`` attribute and fix return tuple of ``BaseImage.run``. Thanks, edenhaus!

**Full Changelog**: https://github.com/mqtt-tools/pytest-mqtt/compare/0.1.0...0.2.0

What's Changed

- Initial release, spawned from [Terkin](https://github.com/hiveeyes/terkin-datalogger) and [mqttwarn](https://github.com/jpmens/mqttwarn).

**Full Changelog**: https://github.com/mqtt-tools/pytest-mqtt/commits/0.1.0