devel/py-flex: Update to 6.14.1
- Switch to GitHub for a while to make use of the test suite which isn't provided via the sdist tarballs.
Changelog:
https://github.com/pipermerriam/flex/blob/v6.14.1/CHANGELOG
MFH: 2024Q4
(cherry picked from commit 559edd6e3e42373c749170bd33da164b85ac5977)