Add Python 3.12 Support (#752) #988

Job	Run time
Run tests on legacy versions (3.7)	1m 27s
Run tests on legacy versions (pypy3.9)	1m 5s
Run linters (flake8)	1m 5s
Run linters (pydocstyle)	1m 36s
Run linters (mypy)	1m 9s
Run tests with coverage	2m 5s
Run tests (3.8)	1m 24s
Run linters (pylint)	1m 11s
Run tests (3.9)	1m 21s
Run tests (3.10)	1m 17s
Run tests (3.11)	1m 14s
Run tests (3.12)	1m 33s
	16m 27s

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