devel/py-keystone-engine: Update to 9.2.0
- Switch to the PEP517 build framework.
- Drop no longer required workarounds.
- Update WWW to to point to the upstream repository instead of the main site, which is now used for other purposes.
Changelog:
https://github.com/keystone-engine/keystone/blob/0.9.2/ChangeLog
devel/py-keystone-engine: Drop workarounds