chore(package): update uglify-js to version 3.2.1 (#24)

package.json

@@ -78,6 +78,6 @@
     "electron-rebuild": "1.6.0",
     "minifier": "0.8.1",
     "node-json-minify": "1.0.0",
-    "uglify-js": "3.2.0"
+    "uglify-js": "3.2.1"
   }
 }