v2.2.3

What's Changed

Only the build infrastructure changes

• misc: Add CLAUDE.md by @yuokada in #138
• Update standard requirement from ~> 1.35.0 to ~> 1.50.0 by @dependabot[bot] in #139
• Bump actions/checkout from 4 to 5 by @dependabot[bot] in #141

Full Changelog: v2.2.2...v2.2.3