Merge pull request #22 from msgflo/greenkeeper/mocha-6.0.0

Update mocha to the latest version 🚀

Author: bergie

package.json

@@ -26,6 +26,6 @@
   "devDependencies": {
     "chai": "^4.0.2",
     "fbp-spec": "^0.6.6",
-    "mocha": "^5.0.0"
+    "mocha": "^6.0.0"
   }
 }