chore(deps): update dependency mocha to v5.0.5

Author: renovate-bot

package.json

@@ -37,7 +37,7 @@
     "quote": "0.4.0"
   },
   "devDependencies": {
-    "mocha": "2.5.3",
+    "mocha": "5.0.5",
     "pre-git": "0.5.1",
     "semantic-release": "15.1.4",
     "travis-deploy-once": "4.4.1"