chore(package): update mocha to version 5.0.0

Closes #48

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "karma-opera-launcher": "1.0.x",
     "karma-phantomjs-launcher": "1.0.x",
     "karma-serve-static": "1.0.x",
-    "mocha": "3.2.x",
+    "mocha": "~5.0.0",
     "standard": "10.x.x",
     "watchify": "3.9.x"
   },