Bump mocha from 7.1.2 to 7.2.0 (#83)

Bumps [mocha](https://github.com/mochajs/mocha) from 7.1.2 to 7.2.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v7.1.2...v7.2.0)

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