chore(package): update mocha to version 5.0.2

Closes #126

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "eslint": "4.14.0",
     "express": "^4.14.0",
     "istanbul": "0.4.5",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.2",
     "should": "^13.1.0",
     "semantic-release": "11.0.2",
     "supertest": "3.0.0"