update pubspec/changelog

pkgs/stream_channel/CHANGELOG.md

diff --git a/pkgs/stream_channel/CHANGELOG.md b/pkgs/stream_channel/CHANGELOG.md
index 093a242..d15b0c0 100644
--- a/pkgs/stream_channel/CHANGELOG.md
+++ b/pkgs/stream_channel/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 1.6.4+1
+
+* Fix an issue with `JsonDocumentTransformer.bind` where it created an internal
+  stream channel which didn't get a properly inferred type for its `sink`.
+
 ## 1.6.4
 
 * Fix a race condition in `MultiChannel` where messages from a remote virtual

pkgs/stream_channel/pubspec.yaml

diff --git a/pkgs/stream_channel/pubspec.yaml b/pkgs/stream_channel/pubspec.yaml
index 393e60f..5abd523 100644
--- a/pkgs/stream_channel/pubspec.yaml
+++ b/pkgs/stream_channel/pubspec.yaml
@@ -1,5 +1,5 @@
 name: stream_channel
-version: 1.6.4
+version: 1.6.4+5
 description: An abstraction for two-way communication channels.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/stream_channel