Bump co-mocha from 1.2.0 to 1.2.2

Bumps [co-mocha](https://github.com/blakeembrey/co-mocha) from 1.2.0 to 1.2.2.
- [Changelog](https://github.com/blakeembrey/co-mocha/blob/master/CHANGELOG.md)
- [Commits](blakeembrey/co-mocha@v1.2.0...v1.2.2)

---
updated-dependencies:
- dependency-name: co-mocha
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]