chore(demo): update angular version

Author: dimirc

examples/bootstrap.html

@@ -18,8 +18,8 @@
     </script>
   <![endif]-->
 
-  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.js"></script>
-  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular-sanitize.js"></script>
+  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.js"></script>
+  <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular-sanitize.js"></script>
   <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.css">
 
   <!-- ui-select files -->