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>

Author: dependabot-preview[bot]