It should be possible to ship less wheels

[glandium]

Since I'm looking into these things for something else and I've noticed there are a lot of wheels for this module, I figured I'd dump this information here: it is possible to build with setup.py bdist_wheel --py-limited-api=cp36, in which case you end with cp36-abi3 wheels that can be installed by any version >= 3.6.

[glandium]

(and it should even work if the python used to build is 3.9, which would allow removing the hack for arm64 python 3.8)

[mhils]

For context, here's some more information on "abi3 wheels": https://pyo3.rs/v0.13.2/building_and_distribution.html#py_limited_apiabi3

[indygreg]

I removed the manylinux2010 wheels in the 0.22 release.

I believe we currently rely on some APIs outside the stable abi3 API surface. But I'd need to check this. Otherwise, I'm totally on board with building against the limited ABI and reducing the number of wheels we ship.