Bump xo from 1.1.1 to 1.2.1

Bumps [xo](https://github.com/xojs/xo) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/xojs/xo/releases)
- [Commits](xojs/xo@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: xo
  dependency-version: 1.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]