chore(deps): update dependency mocha to v5.1.0

Author: renovate-bot

package.json

@@ -84,7 +84,7 @@
     "github-post-release": "1.13.1",
     "got": "8.3.0",
     "license-checker": "18.0.0",
-    "mocha": "3.5.3",
+    "mocha": "5.1.0",
     "next-update-travis": "1.7.1",
     "nsp": "2.8.1",
     "pre-git": "3.17.1",