Add pre-built wheel for python 3.10

[hansingt]

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Currently, only wheels for python 2.7, 3.8 and 3.9 are available on PyPi.

Would you mind adding pre-built wheels for python 3.10 as well?

I know, that one can build the wheel himself from the tar.gz, but this requires a GCC-Toolchain and the kerberos dev libs to be installed. (or a docker daemon and the corresponding manylinux image)

This would safe us lots of time and effort, if you could simply do it once and we can reuse the wheel.

[csjab]

See also #97