Update charted to 0.4.8 and roll

packages/quiver/test/async/collect_test.dart

 // Copyright 2014 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.streams.collect_test;
+library quiver.async.collect_test;
 
 import 'dart:async';
 import 'dart:math';
 
 import 'package:test/test.dart';
-import 'package:quiver/streams.dart';
+import 'package:quiver/async.dart';
 
 main() {
   group('collect', () {
     test('should produce no events for no futures',
         () => collect([]).toList().then((events) => expect(events, isEmpty)));
 
     test('should produce events for future completions in input order', () {
-      var futures = new Iterable.generate(
+      var futures = new Iterable<Future>.generate(
           5, (int i) => i.isEven ? new Future.value(i) : new Future.error(i));
       var events = [];
       var done = new Completer();
 
       collect(futures).listen(events.add, onError: (i) {
         events.add('e$i');
       }, onDone: done.complete);
       return Future.wait(futures).catchError((_) => done.future).then((_) {
         expect(events, [0, 'e1', 2, 'e3', 4]);
       });
     });
 
-    test('should only advance iterator once '
+    test(
+        'should only advance iterator once '
         'event for previous future is sent', () {
       var eventCount = 0;
       var maxParallel = 0;
       var currentParallel = 0;
       var done = new Completer();
       var futures = new Iterable.generate(3, (_) {
         maxParallel = max(++currentParallel, maxParallel);
         return new Future.value();
       });
 
       var collected = collect(futures);
 
       decrementParallel(_) {
         eventCount++;
         currentParallel--;
       }
 
       collected.listen(decrementParallel,
           onError: decrementParallel, onDone: done.complete);
       return done.future.then((_) {
         expect(maxParallel, 1);
         expect(eventCount, 3);
       });
     });
   });
 }