Update charted to 0.4.8 and roll

packages/code_transformers/pubspec.yaml

Index: packages/code_transformers/pubspec.yaml
diff --git a/packages/code_transformers/pubspec.yaml b/packages/code_transformers/pubspec.yaml
index 67da04ed5397177c4d05e52b12a3375376814a3b..e4cf6d97a85d1c8c9bf5aed51a3073d33ed5fbd6 100644
--- a/packages/code_transformers/pubspec.yaml
+++ b/packages/code_transformers/pubspec.yaml
@@ -1,15 +1,17 @@
 name: code_transformers
-version: 0.2.11
+version: 0.5.1+3
 author: Dart Team <misc@dartlang.org>
 description: Collection of utilities related to creating barback transformers.
 homepage: https://github.com/dart-lang/code-transformers
 environment:
   sdk: '>=1.0.0 <2.0.0'
 dependencies:
-  analyzer: '>=0.26.0 <0.27.0'
+  analyzer: '>=0.28.0 <0.31.0'
   barback: '>=0.14.2 <0.16.0'
-  cli_util: '>=0.0.1 <0.1.0'
+  cli_util: '>=0.0.1 <0.2.0'
   path: '>=0.9.0 <2.0.0'
   source_maps: '>=0.9.4 <0.11.0'
   source_span: '>=1.0.0 <2.0.0'
-  unittest: '>=0.10.1 <0.12.0'
+dev_dependencies:
+  test: '>=0.12.1 <0.13.0'
+  transformer_test: '>=0.1.0 <0.3.0'