Issue Description

• Setuptools version 61.0.0+ introduces stricter configuration validation that breaks installation of filterpy due to an invalid configuration key in setup.cfg.

Detailed Problem:

1. Current setuptools versions raise an error for the description-file key in setup.cfg.
2. This prevents installation of filterpy, which is a dependency for facexlib.
3. This error occurs with setuptools versions 61.0.0

Temporary Workaround:

• Downgrade setuptools to version 60.10.0:

pip install setuptools==60.10.0

Recommended Long Term Solution:

Update filterpy packages's setup.cfg to use correct configurtion key:

• Changedescription-file = README.rst todescription_file = README.rst