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build: one abi3 wheel per platform, a wheel per free-threaded CPython - #12
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cffi compiles the module against the limited API, and abi3audit finds nothing beyond 3.10's; the wheel was nevertheless tagged for one CPython, so a platform needed a wheel per version. setup.py now tags a wheel built under the GIL cp310-abi3; cibuildwheel builds it on 3.10 and tests it on each later CPython, and the hash tables of wheels.yml run it under every one of them. Free-threaded CPython has no stable ABI and keeps a wheel per version.
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cffi compiles the module against the limited API, and abi3audit finds nothing
beyond 3.10's; the wheel was nevertheless tagged for one CPython, so a platform
needed a wheel per version. setup.py now tags a wheel built under the GIL
cp310-abi3; cibuildwheel builds it on 3.10 and tests it on each later CPython, and
the hash tables of wheels.yml run it under every one of them. Free-threaded
CPython has no stable ABI and keeps a wheel per version.
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