macOS wheels on PyPI are out-of-date

[crwood]

As per PrivateStorageio/ZKAPAuthorizer#472, the latest stable version of python-challenge-bypass-ristretto provides macOS wheels for macOS 10 and 11 only -- both of which are now unsupported by Apple. In order to prevent users of newer versions of macOS from having to manually build a wheel (which, in this case, requires a Rust toolchain) pre-built wheels should be supplied on PyPI for any/all "currently supported" versions of macOS, if possible.