chore(deps): bump js-yaml and mocha

Bumps [js-yaml](https://github.com/nodeca/js-yaml) to 3.15.2 and updates ancestor dependency [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `js-yaml` from 3.15.1 to 3.15.2
- [Changelog](https://github.com/nodeca/js-yaml/blob/3.15.2/CHANGELOG.md)
- [Commits](nodeca/js-yaml@3.15.1...3.15.2)

Updates `mocha` from 6.2.3 to 12.0.1
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/main/CHANGELOG.md)
- [Commits](mochajs/mocha@v6.2.3...v12.0.1)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-version: 3.15.2
  dependency-type: indirect
- dependency-name: mocha
  dependency-version: 12.0.1
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]