Update charted to 0.4.8 and roll

packages/quiver/test/async/stream_buffer_test.dart

Index: packages/quiver/test/async/stream_buffer_test.dart
diff --git a/packages/quiver/test/streams/streambuffer_test.dart b/packages/quiver/test/async/stream_buffer_test.dart
similarity index 81%
rename from packages/quiver/test/streams/streambuffer_test.dart
rename to packages/quiver/test/async/stream_buffer_test.dart
index d2a74b7de70e9050f09b42468e3ecf77fa0b486d..f2dd7b8c55a5d90ce5808a2f0b7cce140d6629d2 100644
--- a/packages/quiver/test/streams/streambuffer_test.dart
+++ b/packages/quiver/test/async/stream_buffer_test.dart
@@ -12,17 +12,21 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-library quiver.streams.streambuffer_test;
+library quiver.async.stream_buffer_test;
 
 import 'dart:async';
 import 'package:test/test.dart';
-import 'package:quiver/streams.dart';
+import 'package:quiver/async.dart';
 
 void main() {
   group("StreamBuffer", () {
     test("returns orderly overlaps", () {
-      StreamBuffer<int> buf = new StreamBuffer();
-      new Stream.fromIterable([[1], [2, 3, 4], [5, 6, 7, 8]]).pipe(buf);
+      StreamBuffer<List<int>> buf = new StreamBuffer();
+      new Stream.fromIterable([
+        [1],
+        [2, 3, 4],
+        [5, 6, 7, 8]
+      ]).pipe(buf);
       return Future.wait([buf.read(2), buf.read(4), buf.read(2)]).then((vals) {
         expect(vals[0], equals([1, 2]));
         expect(vals[1], equals([3, 4, 5, 6]));
@@ -33,8 +37,13 @@ void main() {
     });
 
     test("respects pausing of stream", () {
-      StreamBuffer<int> buf = new StreamBuffer()..limit = 2;
-      new Stream.fromIterable([[1], [2], [3], [4]]).pipe(buf);
+      StreamBuffer<List<int>> buf = new StreamBuffer()..limit = 2;
+      new Stream.fromIterable([
+        [1],
+        [2],
+        [3],
+        [4]
+      ]).pipe(buf);
       return buf.read(2).then((val) {
         expect(val, [1, 2]);
       }).then((_) {
@@ -45,8 +54,11 @@ void main() {
     });
 
     test("throws when reading too much", () {
-      StreamBuffer<int> buf = new StreamBuffer()..limit = 1;
-      new Stream.fromIterable([[1], [2]]).pipe(buf);
+      StreamBuffer<List<int>> buf = new StreamBuffer()..limit = 1;
+      new Stream.fromIterable([
+        [1],
+        [2]
+      ]).pipe(buf);
       try {
         buf.read(2);
       } catch (e) {