v0.0.21

What's Changed

• Add python 310 support by @shunichironomura in #87
• Remove trailing commas in .vscode/settings.json by @shunichironomura in #88
• rename ruff.yaml by @shunichironomura in #89
• Add GitHub badges by @shunichironomura in #90
• Introduce mypy by @shunichironomura in #91
• Merge GitHub workflows by @shunichironomura in #92
• Bump version to v0.0.21 by @github-actions in #93

Full Changelog: v0.0.20...v0.0.21