prepare for release

Author: nadar

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file. This project make usage of the [Yii Versioning Strategy](https://github.com/yiisoft/yii2/blob/master/docs/internals/versions.md). In order to read more about upgrading and BC breaks have a look at the [UPGRADE Document](UPGRADE.md).
 
-## 1.0.6 (in progress)
+## 1.0.6 (3. September 2018)
 
 ### Changed