Merge pull request #25 from scurker/greenkeeper/mocha-5.0.0

Update mocha to the latest version 🚀

Author: scurker

package.json

@@ -38,7 +38,7 @@
     "eslint": "^4.1.0",
     "istanbul": "^0.4.5",
     "jsdom": "^11.0.0",
-    "mocha": "^4.0.0",
+    "mocha": "^5.0.0",
     "nyc": "^11.0.2",
     "preact": "^8.1.0",
     "rollup": "^0.54.0",