Add support for Python 3.13 #531

Job	Run time
Python 3.7 on macos-13	3m 42s
Linux docs	1m 10s
Python 3.13-dev on macos-13	3m 46s
Linux meta	1m 7s
Python 3.7 on Windows x86	2m 28s
Python 3.13-dev (minimal build) on macos-13	3m 20s
Linux mypy	1m 1s
Python 3.8 on Windows x86	2m 27s
Python 3.13-dev on macos-latest	2m 4s
Linux pypy3	2m 47s
Python 3.9 on Windows x86	2m 12s
Python 3.13-dev (minimal build) on macos-latest	1m 46s
Linux pypy3	2m 50s
Python 3.10 on Windows x86	2m 31s
Linux py37	1m 46s
Python 3.11 on Windows x86	2m 34s
Linux py38	1m 46s
Python 3.12 on Windows x86	2m 36s
Python 3.13-dev on Windows x86	2m 55s
Linux py39	1m 55s
Python 3.7 on Windows x64	2m 10s
Python 3.8 on Windows x64	1m 45s
Linux py310	1m 53s
Python 3.9 on Windows x64	2m 5s
Linux py311	1m 45s
Python 3.10 on Windows x64	1m 53s
Linux py312	2m 0s
Python 3.11 on Windows x64	2m 22s
Linux py313	1m 55s
Python 3.12 on Windows x64	2m 7s
Linux py313 system	2m 47s
Python 3.13-dev on Windows x64	2m 18s
Linux py313 minimal	1m 48s
	1h 13m 31s

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