Updating Angular version

third_party/pkg/angular/demo/todo/web/todo.dart

 library todo;
 
 import 'package:angular/angular.dart';
 
+
 class Item {
   String text;
   bool done;
 
   Item([String this.text = '', bool this.done = false]);
 
   bool get isEmpty => text.isEmpty;
 
   clone() => new Item(text, done);
 
@@ skipping 69 matching lines @@
   }
 
   String classFor(Item item) {
     return item.done ? 'done' : '';
   }
 
   int remaining() {
     return items.where((item) => !item.done).length;
   }
 }