cibuildwheel: While cibuildwheel can build CPython 3.8 universal2/arm64 wheels, we cannot test the arm64 part of them, even when running on an Apple Silicon machine. This is because we use the x86_64 installer of CPython 3.8. See the discussion in https://github.com/pypa/cibuildwheel/pull/1169 for the details. To silence this warning, set `CIBW_TEST_SKIP: "cp38-macosx_*:arm64"`.

cibuildwheel: Invalid skip selector: 'cp37-*'. cibuildwheel 3.x no longer supports Python < 3.8. Please use the 2.x series or update `skip`. This selector will have no effect.

cibuildwheel: Invalid skip selector: 'cp36-*'. cibuildwheel 3.x no longer supports Python < 3.8. Please use the 2.x series or update `skip`. This selector will have no effect.