Drops Py3.7, improves typing and adds a mypy config, improves the docstrings and isorts the imports.
* configure isort
* sort with isort
* add github action
* enable flake8-docstrings
* fix docstrings
* add mypy env
* no implicit optional
* add type for raw
* add some type hints
* Add buzzer function
* Add `buzzer(time, duration)` function to control the buzzer on supported
printers.
* Add unit tests for buzzer function.
* Update test_function_buzzer.py to pass black
* Run black in tests files
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Co-authored-by: Patrick Kanzler <dev@pkanzler.de>