Prepare release

packages/zefyr/CHANGELOG.md

+## 0.1.1
+
+* Fixed: Prevent sending excessive value updates to the native side
+  which cause race conditions (#12).
+
 ## 0.1.0
 
 *  Initial release.

packages/zefyr/pubspec.yaml

 name: zefyr
 description: Rich text editor for Flutter.
-version: 0.1.0
+version: 0.1.1
 author: Anatoly Pulyaevskiy <anatoly.pulyaevskiy@gmail.com>
 homepage: https://github.com/pulyaevskiy/zefyr