Update README.md

README.md

 
 ![image](https://github.com/CaiJingLong/some_asset/blob/master/image_picker1.gif)
 
-## API incompatibility
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-API incompatibility
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-because support video, so the ImagePathEntity and ImageEntity rename to AssetPathEntity and AssetEntity.
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-so PhotoPicker.pickImage return type will change to `List<AssetEntity>`
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 ## install
 
 latest version : [![pub package](https://img.shields.io/pub/v/photo.svg)](https://pub.dartlang.org/packages/photo)