Pct-python-default-test

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2024-01-11:
- add black 3.12 style
- set osx version to 3.12
- set windows version to 3.12

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2023-07-14:
- move 3rd_party_stubs directory to ``./.3rd_party_stubs``

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2023-07-13:
- require minimum python 3.8
- remove python 3.7 tests

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2023-06-26:
- correct black settings
- get rid of travis
- do not upload .egg files to pypi.org

2023-01-13:
update github actions : [checkoutv3](mailto:checkoutv3) and [setup-pythonv4](mailto:setup-pythonv4)
remove "better code" badges
remove python 3.6 tests
add python 3.11 tests
update to pypy 3.9 tests

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2022-05-20: update github actions test matrix to python 3.10