Log Message:
py-gssapi: updated to 1.6.12

Release v1.6.12: Meyer (Patch 12)

Fix GSSAPI detection for macOS Big Sur
Clarify how to disable detection

Release v1.6.11: Meyer (Patch 11)

Fix build on FreeBSD
On FreeBSD, prefer GSSAPI from ports if available
Support python >= 3.8 in test suite by dropping dependency on should_be
Fix malformed S4U tests

Release v1.6.10: Meyer (Patch 10)

Provide python 3.9 Windows wheels
Fix shlex.split on Windows
Removed six package and other older py cleanup values