4.0.1 - Add dependency, Adafruit Logging

This release:

• #49 Adds Adafruit_Logging as a dependency, thanks @askpatrickw

To use in CircuitPython, simply install the Adafruit CircuitPython bundle.

To use in CPython, pip3 install adafruit-circuitpython-minimqtt.

Read the docs for info on how to use it.