Minimally migrate to pyproject.toml #479

Job	Run time
Python 3.7 on macos-13	3m 44s
Linux docs	1m 4s
Python 3.12 on macos-13	2m 58s
Linux meta	1m 2s
Python 3.7 on Windows x86	3m 4s
Python 3.12 (minimal build) on macos-13	3m 15s
Linux mypy	56s
Python 3.8 on Windows x86	3m 6s
Python 3.12 on macos-latest	1m 31s
Linux pypy3	3m 16s
Python 3.9 on Windows x86	3m 3s
Python 3.12 (minimal build) on macos-latest	1m 23s
Linux pypy3	2m 42s
Python 3.10 on Windows x86	3m 4s
Linux py37	1m 38s
Python 3.11 on Windows x86	3m 5s
Linux py38	1m 40s
Python 3.12 on Windows x86	2m 6s
Linux py39	1m 39s
Python 3.7 on Windows x64	2m 9s
Python 3.8 on Windows x64	2m 7s
Linux py310	1m 37s
Python 3.9 on Windows x64	1m 59s
Linux py311	1m 39s
Python 3.10 on Windows x64	2m 5s
Linux py312	1m 44s
Python 3.11 on Windows x64	2m 4s
Linux py312 system	2m 16s
Python 3.12 on Windows x64	2m 9s
Linux py312 minimal	1m 36s
	1h 5m 41s

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