chore(package): update mocha to version 5.0.3

Closes #14

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "eslint-config-fullcube": "^3.0.0",
     "husky": "0.14.1",
     "loopback": "3.8.0",
-    "mocha": "3.4.2",
+    "mocha": "5.0.3",
     "mocha-sinon": "2.0.0",
     "nyc": "11.0.3",
     "semantic-release": "6.3.6",