Bump @babel/plugin-transform-classes from 7.13.0 to 7.20.7

Bumps [@babel/plugin-transform-classes](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-transform-classes) from 7.13.0 to 7.20.7.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.20.7/packages/babel-plugin-transform-classes)

---
updated-dependencies:
- dependency-name: "@babel/plugin-transform-classes"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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