v2.0.8

v2.0.8

2023-07-20:
- require minimum python 3.8
- remove python 3.7 tests
- introduce PEP517 packaging standard
- introduce pyproject.toml build-system
- remove mypy.ini
- remove pytest.ini
- remove setup.cfg
- remove setup.py
- remove .bettercodehub.yml
- remove .travis.yml
- update black config
- clean ./tests/test_cli.py
- add codeql badge
- move 3rd_party_stubs outside the src directory to ./.3rd_party_stubs
- add pypy 3.10 tests
- add python 3.12-dev tests