Greenkeeper/uglify es 3.3.7 (#47)

* chore(package): update uglify-es to version 3.3.7

Closes #44

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: GitSquared

package-lock.json

@@ -87,6 +87,6 @@
     "electron-builder": "19.52.1",
     "electron-rebuild": "1.6.0",
     "node-json-minify": "1.0.0",
-    "uglify-es": "3.3.4"
+    "uglify-es": "3.3.7"
   }
 }