chore(package): update uglify-js to version 3.5.9

package.json

@@ -51,6 +51,6 @@
     "pre-commit": "~1.2.0",
     "sauce-browsers": "~2.0.0",
     "sauce-test": "~1.3.3",
-    "uglify-js": "~3.5.0"
+    "uglify-js": "~3.5.9"
   }
 }