0.15.0

This is CacheLib's 0.15.0 feature release. A feature release may include new features, remove previously deprecated code, add new deprecations, or introduce potentially breaking changes. We encourage everyone to upgrade, and to use a tool such as pip-tools to pin all dependencies and control upgrades. Test with warnings treated as errors to be able to adapt to deprecation warnings early.

PyPI: https://pypi.org/project/CacheLib/0.15.0/
Changes: https://cachelib.readthedocs.io/en/stable/changes/#version-0.15.0
Milestone: https://github.com/pallets-eco/cachelib/milestone/2?closed=1

• Make SimpleCache thread-safe using a threading.RLock. #446
• Make pylibmc and libmc clients thread-safe by using ClientPool. #287
• Drop support for Python 3.8, 3.9 and 3.10. #477
• Add support for optional dependencies in pyproject.toml to allow users to
  install the dependencies for specific cache backends as needed. #432

Full Changelog: 0.14.0...0.15.0