Update README.md

Author: crazycodeboy

README.md

@@ -7,6 +7,7 @@
 [ ![语言 中文](https://img.shields.io/badge/语言-中文-feb252.svg)](https://github.com/crazycodeboy/react-native-splash-screen/blob/master/README.zh.md)
 [![License MIT](http://img.shields.io/badge/license-MIT-orange.svg?style=flat)](https://raw.githubusercontent.com/crazycodeboy/react-native-check-box/master/LICENSE)
 [ ![原理 解析](https://img.shields.io/badge/原理-解析-brightgreen.svg)](https://github.com/crazycodeboy/RNStudyNotes/blob/master/React%20Native%20%E9%97%AE%E9%A2%98%E5%8F%8A%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88%E5%90%88%E9%9B%86/React%20Native%20%E5%90%AF%E5%8A%A8%E7%99%BD%E5%B1%8F%E9%97%AE%E9%A2%98%E8%A7%A3%E5%86%B3%E6%95%99%E7%A8%8B/React%20Native%20%E5%90%AF%E5%8A%A8%E7%99%BD%E5%B1%8F%E9%97%AE%E9%A2%98%E8%A7%A3%E5%86%B3%E6%95%99%E7%A8%8B.md)
+[ ![Flutter](https://img.shields.io/badge/Flutter-brightgreen.svg)](https://github.com/crazycodeboy/flutter_splash_screen)
 
 A splash screen API for react-native which can programatically hide and show the splash screen. Works on iOS and Android.