security/py-zkg: Update to 2.12.0

 - Changes since 2.10.0:

 - Support testing package dependencies in Manager.test()

 - Interpolate test_command

 - Strengthen the installation-staging concept

 - Update baseline of test affected by new package install order

 - Consistently modify the environment during staging and testing

 - Install/upgrade packages in reverse dependency order

 - Ensure breadth-first reporting of new nodes in
   Manager.validate_dependencies()

 - Install executables during staging

 - Accept `uninstall` as an alias for `remove`

 - Incorporate sphinx-argparse upstream fix for aliased commands

PR:		259724
Reported by:	mshirk@daemon-security.com
Approved by:	mshirk@daemon-security.com (maintainer)