chore(package): update mocha to version 5.0.5

Closes #112

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
     "@types/node": "8.0.53",
     "express": "4.16.2",
     "typescript": "2.6.2",
-    "mocha": "4.0.1"
+    "mocha": "5.0.5"
   },
   "dependencies": {
     "cheerio-httpcli": "0.7.2",