Add support for Python 3.13 #528

Job	Run time
Linux docs	1m 2s
Linux meta	1m 15s
Python 3.7 on macos-13	3m 52s
Linux mypy	1m 10s
Python 3.13 on macos-13	5m 40s
Linux pypy3	2m 50s
Python 3.7 on Windows x86	2m 22s
Python 3.13 (minimal build) on macos-13	3m 28s
Python 3.8 on Windows x86	2m 28s
Linux pypy3	3m 4s
Python 3.13 on macos-latest	1m 52s
Python 3.9 on Windows x86	2m 28s
Python 3.13 (minimal build) on macos-latest	2m 57s
Linux py37	1m 55s
Python 3.10 on Windows x86	2m 29s
Linux py38	1m 46s
Linux py39	1m 49s
Python 3.11 on Windows x86	2m 17s
Linux py310	1m 52s
Linux py311	1m 47s
Python 3.12 on Windows x86	2m 37s
Linux py312	1m 56s
Python 3.13 on Windows x86	2m 39s
Linux py313	1m 55s
Python 3.7 on Windows x64	2m 0s
Linux py313 system	2m 37s
Python 3.8 on Windows x64	2m 18s
Linux py313 minimal	1m 48s
Python 3.9 on Windows x64	2m 21s
Python 3.10 on Windows x64	1m 51s
Python 3.11 on Windows x64	2m 8s
Python 3.12 on Windows x64	1m 59s
Python 3.13 on Windows x64	2m 53s
	1h 17m 25s

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