Update charted to 0.4.8 and roll

packages/unittest/CHANGELOG.md

Index: packages/unittest/CHANGELOG.md
diff --git a/packages/unittest/CHANGELOG.md b/packages/unittest/CHANGELOG.md
index 8e454018d2069e8f451848b08c8ae26be40fcdef..b60e66b13f3d7f381725cddefe70d62518add4ec 100644
--- a/packages/unittest/CHANGELOG.md
+++ b/packages/unittest/CHANGELOG.md
@@ -1,3 +1,23 @@
+##0.11.7
+
+* Add separate methods for `expectAysnc` based on number of callback arguments 
+  `expectAsync0`, `expectAsync1`, ... `expectAsync6`.
+* Fix all strong mode warnings.
+
+##0.11.6+4
+
+* Fix some strong mode warnings we missed in the `vm_config.dart` and
+  `html_config.dart` libraries.
+
+##0.11.6+3
+
+* Fix a bug introduced in 0.11.6+2 in which operator matchers broke when taking
+  lists of matchers.
+
+##0.11.6+2
+
+* Fix all strong mode warnings.
+
 ##0.11.6+1
 
 * Give tests more time to start running.