Merge pull request #5 from gucong3000/greenkeeper/mocha-5.1.0

chore(package): update mocha to version 5.1.0

Author: gucong3000

package.json

@@ -54,7 +54,7 @@
     "eslint-plugin-node": "^6.0.1",
     "eslint-plugin-promise": "^3.7.0",
     "eslint-plugin-standard": "^3.0.1",
-    "mocha": "^5.0.5",
+    "mocha": "^5.1.0",
     "nyc": "^11.6.0",
     "postcss": "^6.0.21",
     "postcss-safe-parser": "^3.0.1"