Bump mocha from 6.1.4 to 7.0.0

Bumps [mocha](https://github.com/mochajs/mocha) from 6.1.4 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/v6.1.4...v7.0.0)

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

package.json

@@ -71,7 +71,7 @@
     "eslint-config-airbnb-base": "^13.2.0",
     "eslint-plugin-import": "^2.11.0",
     "istanbul": "^0.4.0",
-    "mocha": "^6.0.2",
+    "mocha": "^7.0.0",
     "nodemon": "^1.17.3",
     "should": "^13.2.1"
   }