Merge pull request #71 from wbyoung/greenkeeper/mocha-5.0.0

Update mocha to the latest version 🚀

Author: wbyoung

package.json

@@ -61,7 +61,7 @@
     "eslint": "^4.1.0",
     "eslint-plugin-flowtype": "^2.29.2",
     "flow-bin": "^0.61.0",
-    "mocha": "^4.0.1",
+    "mocha": "^5.0.0",
     "nyc": "^11.0.1",
     "postcss": "^6.0.7",
     "postcss-modules": "^1.0.0",