chore(deps): update dependency mocha to v5

Author: renovate-bot

package.json

@@ -80,7 +80,7 @@
     "git-issues": "1.3.1",
     "github-post-release": "1.13.1",
     "license-checker": "15.0.0",
-    "mocha": "4.1.0",
+    "mocha": "5.2.0",
     "nsp": "2.8.1",
     "pre-git": "3.17.1",
     "prettier-standard": "7.0.3",