Update charted to 0.4.8 and roll

packages/quiver_iterables/test/min_max_test.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.iterables.min_max_test;
-
-import 'package:test/test.dart';
-import 'package:quiver_iterables/iterables.dart';
-
-main() {
-  group('max', () {
-    test('should return the maximum element', () {
-      expect(max([2, 5, 1, 4]), 5);
-    });
-
-    test('should return null if the iterable is empty', () {
-      expect(max([]), null);
-    });
-  });
-
-  group('min', () {
-    test('should return the minimum element', () {
-      expect(min([2, 5, 1, 4]), 1);
-    });
-
-    test('should return null if the iterable is empty', () {
-      expect(min([]), null);
-    });
-  });
-
-  group('extent', () {
-    test('should return the max and min elements', () {
-      var ext = extent([2, 5, 1, 4]);
-      expect(ext.min, 1);
-      expect(ext.max, 5);
-    });
-
-    test('should return the single element', () {
-      var ext = extent([2]);
-      expect(ext.min, 2);
-      expect(ext.max, 2);
-    });
-
-    test('should return null if the iterable is empty', () {
-      var ext = extent([]);
-      expect(ext.min, null);
-      expect(ext.max, null);
-    });
-  });
-}