Bump mocha-headless-chrome from 4.0.0 to 5.1.0

Bumps [mocha-headless-chrome](https://github.com/direct-adv-interfaces/mocha-headless-chrome) from 4.0.0 to 5.1.0.
- [Release notes](https://github.com/direct-adv-interfaces/mocha-headless-chrome/releases)
- [Changelog](https://github.com/direct-adv-interfaces/mocha-headless-chrome/blob/master/CHANGELOG.md)
- [Commits](https://github.com/direct-adv-interfaces/mocha-headless-chrome/commits)

---
updated-dependencies:
- dependency-name: mocha-headless-chrome
  dependency-version: 5.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]