Bump mocha from 5.0.0 to 5.0.4

Bumps [mocha](https://github.com/mochajs/mocha) from 5.0.0 to 5.0.4.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v5.0.0...v5.0.4)

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

package.json

@@ -49,7 +49,7 @@
   "devDependencies": {
     "eslint": "^4.18.2",
     "eslint-config-loopback": "^10.0.0",
-    "mocha": "^5.0.0",
+    "mocha": "^5.0.4",
     "nodemon": "^1.15.1"
 
   },