Bump mocha from 8.0.1 to 8.1.0 (yahoo#90)

Bumps [mocha](https://github.com/mochajs/mocha) from 8.0.1 to 8.1.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v8.0.1...v8.1.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>