Install break with Setuptools 70

[dmiller75]

pip install purity-fb fails with the newer version of Setuptools with:

File "/usr/local/lib/python3.9/site-packages/setuptools/_core_metadata.py", line 293, in _distribution_fullname canonicalize_version(version, strip_trailing_zero=False), TypeError: canonicalize_version() got an unexpected keyword argument 'strip_trailing_zero'

downgrading to v68 resolves the initial install error, however py_pure_client then unistalls v68 and reinstall v70.

likely needs a version check for setuptools and either an upgrade of it, or a usage change.