chore(package): update mocha to version 5.1.1

package.json

@@ -42,7 +42,7 @@
   "devDependencies": {
     "assume": "~2.0.0",
     "istanbul": "~0.4.5",
-    "mocha": "~5.1.0",
+    "mocha": "~5.1.1",
     "pre-commit": "~1.2.0",
     "request": "~2.85.0"
   }