v0.6.3

What's Changed

• Fix README rendering on PyPI
• Drop support for Python 3.7/3.8
• Add support for Python 3.13
• Improve type annotations
• Bump sigstore/gh-action-sigstore-python from 2.1.1 to 3.0.0 in the actions-dependencies group by @dependabot in #12

Full Changelog: v0.6.2...v0.6.3