chore(package): update mocha to version 5.0.2

Closes #4

Author: greenkeeper[bot]

package.json

@@ -55,7 +55,7 @@
     "@types/mocha": "^2.2.42",
     "@types/winston": "^2.3.5",
     "eslint": "^4.6.1",
-    "mocha": "^3.5.0",
+    "mocha": "^5.0.2",
     "request": "^2.81.0",
     "request-promise": "^4.2.1",
     "typescript": "^2.5.2"