Bump xo from 0.39.1 to 0.42.0

Bumps [xo](https://github.com/xojs/xo) from 0.39.1 to 0.42.0.
- [Release notes](https://github.com/xojs/xo/releases)
- [Commits](xojs/xo@v0.39.1...v0.42.0)

---
updated-dependencies:
- dependency-name: xo
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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