Merge pull request #462 from syuilo/greenkeeper/mocha-3.4.1

Update mocha to the latest version 🚀

package.json

@@ -80,7 +80,7 @@
     "gulp-typescript": "3.1.6",
     "gulp-uglify": "2.1.2",
     "gulp-util": "3.0.8",
-    "mocha": "3.3.0",
+    "mocha": "3.4.1",
     "riot-tag-loader": "1.0.0",
     "string-replace-webpack-plugin": "0.1.3",
     "stylus": "0.54.5",