v2.2.0

What's Changed

• Drop support for Python 3.9.
• Ship inline type information via a py.typed marker for type checkers.
• Tighten and extend type hints across the public API, templates, and sources.
• Add strict mypy configuration and align tests/examples with the new typing.
• Include docs and tests directory in source distributions.

Full Changelog: v2.1.0...v2.2.0