update firebase version in example

yyx990803 · yyx990803 · commit ec44ca1b9d87 · 2015-08-01T17:47:54.000-04:00
diff --git a/examples/firebase/index.html b/examples/firebase/index.html
@@ -4,7 +4,7 @@
     <title>Vue.js Firebase example</title>
     <meta charset="utf-8">
     <link rel="stylesheet" type="text/css" href="style.css">
-    <script src='https://cdn.firebase.com/js/client/1.1.2/firebase.js'></script>
+    <script src='https://cdn.firebase.com/js/client/2.2.9/firebase.js'></script>
     <script src="../../dist/vue.js"></script>
   </head>
   <body>
@@ -27,4 +27,4 @@
     </div>
     <script src="app.js"></script>
   </body>
-</html>
+</html>
