chore(package): update mocha to version 5.0.1

Closes #31

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
   "devDependencies": {
     "fs-extra": "^2.1.2",
     "jshint": "^2.8.0",
-    "mocha": "^3.2.0",
+    "mocha": "^5.0.1",
     "yeoman-test": "^1.6.0"
   }
 }