chore(package): update mocha to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "chai-http": "^3.0.0",
     "coveralls": "^3.0.0",
     "eslint": "^4.12.1",
-    "mocha": "^4.1.0",
+    "mocha": "^5.0.0",
     "mock-require": "^3.0.0",
     "nyc": "^11.4.0",
     "sinon": "^4.1.3",