Drop support for Mercurial 5.2 & 5.3 as well as Python 3.6
- Python 3.6 doesn't include the
importlib.resources
module. - Mercurial 5.2 has somewhat worse support for Python 3.x than later releases.
- Mercurial 5.3 is just really old by now.
All legacy (hg-git based) Projects have been automatically migrated to native with the upgrade of 2025-01-23
importlib.resources
module.