Bump mocha from 1.7.0 to 1.8.0 (#1473)
Bump mocha from 1.7.0 to 1.8.0 (#1473)

Bumps [mocha](https://github.com/freerange/mocha) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/freerange/mocha/releases)
- [Changelog](https://github.com/freerange/mocha/blob/master/RELEASE.md)
- [Commits](https://github.com/freerange/mocha/compare/v1.7.0...v1.8.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
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