update version 0.0.6

CHANGELOG.md

 # CHANGELOG
 
+## [0.0.6] add checkbox delegate
+users can use CheckBoxDelegate to custom preview right bottom widget
+
 ## [0.0.5] add a params
 
 add the sort delegate to help user sort gallery

README.md

 
 ```yaml
 dependencies:
-  photo: ^0.0.5
+  photo: ^0.0.6
 ```
 
 ## import

pubspec.yaml

 name: photo
 description: image picker, multi picker,use flutter as ui, if you want to build custom ui,you just use photo_manager.
-version: 0.0.5
+version: 0.0.6
 author: caijinglong<cjl_spy@163.com>
 homepage: https://github.com/CaiJingLong/flutter_photo