bump for 0.9.1 release

BUG=

Review URL: https://codereview.chromium.org//1351583002 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d0aba5..229efd0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.9.1
+
+* Base64 convert returns an Uint8List
+* Base64 codec and encoder can now take an encodePaddingCharacter
+* Implement a Base64 codec similar to codecs in 'dart:convert'
+
 ## 0.9.0
 
-- ChangeLog starts here.
+* ChangeLog starts here.
diff --git a/pubspec.yaml b/pubspec.yaml
index 04fc65a..dcee08d 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: crypto
-version: 0.9.1-dev
+version: 0.9.1
 author: Dart Team <misc@dartlang.org>
 description: Library of cryptographic functions.
 homepage: https://www.github.com/dart-lang/crypto