Bump mocha from 6.2.2 to 7.0.0

Bumps [mocha](https://github.com/mochajs/mocha) from 6.2.2 to 7.0.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v6.2.2...v7.0.0)

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

package.json

@@ -52,7 +52,7 @@
         "glob": "^7.1.6",
         "inquirer": "^7.0.1",
         "lerna": "^3.20.2",
-        "mocha": "^6.2.2",
+        "mocha": "^7.0.0",
         "mocha-chrome": "^2.2.0",
         "node-sass": "^4.13.0",
         "rollup": "^1.27.14",