chore(deps): update dependency mocha to v5.1.1

Author: renovate-bot

package.json

@@ -87,7 +87,7 @@
     "git-issues": "1.3.1",
     "github-post-release": "1.13.1",
     "license-checker": "18.0.0",
-    "mocha": "5.1.0",
+    "mocha": "5.1.1",
     "nsp": "3.2.1",
     "pre-git": "3.17.1",
     "prettier-standard": "8.0.1",