update example version

Author: youfoundron

example/package.json

@@ -13,6 +13,6 @@
   "dependencies": {
     "gatsby": "^1.9.38",
     "gatsby-link": "^1.6.16",
-    "gatsby-plugin-uncss": "^0.1.4"
+    "gatsby-plugin-uncss": "^1.0.0"
   }
 }