Bump mocha from 5.2.0 to 7.0.0

Bumps [mocha](https://github.com/mochajs/mocha) from 5.2.0 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/v5.2.0...v7.0.0)

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

package.json

@@ -93,7 +93,7 @@
     "eslint": "^5.13.0",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-plugin-import": "^2.16.0",
-    "mocha": "^5.2.0",
+    "mocha": "^7.0.0",
     "nodemon": "^1.18.10",
     "supertest": "^4.0.2",
     "tmp": "0.1.0"