Minimally migrate to pyproject.toml #490

Job	Run time
Python 3.7 on macos-13	3m 10s
Linux docs	1m 10s
Python 3.12 on macos-13	2m 53s
Linux meta	1m 7s
Linux mypy	1m 0s
Python 3.12 (minimal build) on macos-13	2m 48s
Linux pypy3	2m 36s
Python 3.12 on macos-latest	1m 31s
Linux pypy3	2m 40s
Python 3.12 (minimal build) on macos-latest	1m 24s
Linux py37	1m 34s
Linux py38	1m 38s
Python 3.7 on Windows x86	2m 29s
Linux py39	1m 35s
Python 3.8 on Windows x86	2m 30s
Linux py310	1m 42s
Python 3.9 on Windows x86	2m 32s
Linux py311	1m 38s
Python 3.10 on Windows x86	2m 43s
Linux py312	1m 43s
Python 3.11 on Windows x86	2m 42s
Linux py312 system	2m 12s
Python 3.12 on Windows x86	2m 34s
Linux py312 minimal	1m 34s
Python 3.7 on Windows x64	2m 2s
Python 3.8 on Windows x64	2m 3s
Python 3.9 on Windows x64	2m 8s
Python 3.10 on Windows x64	1m 59s
Python 3.11 on Windows x64	2m 14s
Python 3.12 on Windows x64	1m 55s
	1h 1m 46s

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