Add Python 3.12 Support (#752) #961

Job	Run time
Run linters (flake8)	1m 56s
Run linters (pydocstyle)	2m 28s
Run linters (mypy)	3m 12s
Run linters (pylint)	3m 10s
Run tests with coverage	1m 10s
Run tests (3.8)	1m 22s
Run tests on legacy versions (2.7)	4s
Run tests (3.9)	1m 14s
Run tests on legacy versions (3.5)	11s
Run tests (3.10)	1m 15s
Run tests on legacy versions (3.6)	7s
Run tests (3.11)	1m 33s
Run tests on legacy versions (3.7)	21s
Run tests (3.12)	4m 4s
Run tests on legacy versions (pypy2.7)	17s
Run tests on legacy versions (pypy3.9)	13s
	22m 37s

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