chore(package): update mocha to version 5.0.1

Closes #17

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "loopback-boot": "2.24.0",
     "loopback-component-explorer": "4.2.0",
     "loopback-component-fixtures": "1.1.0",
-    "mocha": "3.4.2",
+    "mocha": "5.0.1",
     "nodemon": "1.9.2",
     "nyc": "11.0.2",
     "semantic-release": "6.3.6",