Adafruit-circuitpython-minimqtt

What's Changed
* add missing logger check by vladak in https://github.com/adafruit/Adafruit_CircuitPython_MiniMQTT/pull/152


**Full Changelog**: https://github.com/adafruit/Adafruit_CircuitPython_MiniMQTT/compare/7.2.0...7.2.1

This release implements exponential backoff logic when connecting to MQTT server. Thank you vladak!

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

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

Read the [docs](http://circuitpython.readthedocs.io/projects/minimqtt/en/latest/) for info on how to use it.

Added preliminary type annotations for this library. Thanks vladak!

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

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

Read the [docs](http://circuitpython.readthedocs.io/projects/minimqtt/en/latest/) for info on how to use it.

Updated module to use f-strings instead of `format()`. Thanks vladak!

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

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

Read the [docs](http://circuitpython.readthedocs.io/projects/minimqtt/en/latest/) for info on how to use it.

Removed argument from docstring that no longer exists. Thanks vladak!

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

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

Read the [docs](http://circuitpython.readthedocs.io/projects/minimqtt/en/latest/) for info on how to use it.

This release adds `user_data` argument to the init function. This optional data object will be passed to the mqtt callback functions when they are called.

To use in CircuitPython, simply install the [Adafruit CircuitPython Bundle](https://circuitpython.org/libraries).

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

Read the [docs](http://circuitpython.readthedocs.io/projects/minimqtt/en/latest/) for info on how to use it.