Bumping MACOSX_DEPLOYMENT_TARGET (10.11) to the minimum required (11.0).

While arm64 wheels can be built on x86_64, they cannot be tested. Consider building arm64 wheels natively, if your CI provider offers this. To silence this warning, set `CIBW_TEST_SKIP: "*-macosx_arm64"`.

While universal2 wheels can be built on x86_64, the arm64 part of the wheel cannot be tested on x86_64. Consider building universal2 wheels on an arm64 runner, if your CI provider offers this. Notably, an arm64 runner can also test the x86_64 part of the wheel, through Rosetta emulation. To silence this warning, set `CIBW_TEST_SKIP: "*-macosx_universal2:arm64"`.

Setting SYSTEM_VERSION_COMPAT=0 to ensure CPython 3.8 can get correct macOS version and allow installation of wheels with MACOSX_DEPLOYMENT_TARGET >= 11.0. See https://github.com/pypa/cibuildwheel/issues/1767 for the details.