Update README.md

Author: Javier Morant

README.md

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 # react-native-nested-listview
 Nested listview component for React native that it allows to create a listview that has N levels of nesting
 
+![platforms](https://img.shields.io/badge/platforms-Android%20%7C%20iOS-brightgreen.svg?style=flat-square)
+[![npm](https://img.shields.io/npm/v/react-native-nested-listview.svg?style=flat-square)](https://www.npmjs.com/package/react-native-nested-listview)
+[![github release](https://img.shields.io/github/release/fjmorant/react-native-nested-listview.svg?style=flat-square)](https://github.com/fjmorant/react-native-nested-listview/releases)
 
 ## Table of contents