Update Firebase Auth version

Author: tristanvanech

appengine/standard/firebase/firenotes/frontend/index.html

@@ -10,8 +10,8 @@
   <script src="https://www.gstatic.com/firebasejs/3.2.1/firebase.js"></script>
   <script src="https://www.gstatic.com/firebasejs/3.1.0/firebase-app.js"></script>
   <script src="https://www.gstatic.com/firebasejs/3.1.0/firebase-auth.js"></script>
-  <script src="https://www.gstatic.com/firebasejs/ui/live/0.4/firebase-ui-auth.js"></script>
-  <link type="text/css" rel="stylesheet" href="https://www.gstatic.com/firebasejs/ui/live/0.4/firebase-ui-auth.css">
+  <script src="https://www.gstatic.com/firebasejs/ui/live/0.5/firebase-ui-auth.js"></script>
+  <link type="text/css" rel="stylesheet" href="https://www.gstatic.com/firebasejs/ui/live/0.5/firebase-ui-auth.css">
   <link rel="stylesheet" type="text/css" href="style.css">
   <script src="/main.js"></script>
   <title>Firenotes</title>