Update charted to 0.4.8 and roll

packages/quiver/test/collection/all_tests.dart

 // Copyright 2013 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 library quiver.collection.all_tests;
 
 import 'bimap_test.dart' as bimap;
 import 'collection_test.dart' as collection;
 import 'lru_map_test.dart' as lru_map;
 import 'multimap_test.dart' as multimap;
 import 'treeset_test.dart' as treeset;
 import 'delegates/iterable_test.dart' as iterable;
 import 'delegates/list_test.dart' as list;
 import 'delegates/map_test.dart' as map;
 import 'delegates/queue_test.dart' as queue;
-import 'delegates/set_test.dart' as set;
+import 'delegates/set_test.dart' as setTest;
 
 main() {
   bimap.main();
   collection.main();
   lru_map.main();
   multimap.main();
   iterable.main();
   list.main();
   map.main();
   queue.main();
-  set.main();
+  setTest.main();
   treeset.main();
 }