Update README.md

Author: rodriigovieira

README.md

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   React Native Navigation Drawer Extension
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 <p align="center">
   <a href="https://www.npmjs.com/package/react-native-navigation-drawer-extension" rel="nofollow">
   <img src="https://img.shields.io/npm/v/react-native-navigation-drawer-extension.svg?style=flat-square" alt="version" style="max-width:100%;" />