Bump mocha from 7.2.0 to 8.0.1 (#88)

Bumps [mocha](https://github.com/mochajs/mocha) from 7.2.0 to 8.0.1.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v7.2.0...v8.0.1)

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