Update README.md

Minishlink · web-flow · commit 5120b5df4c88 · 2021-06-02T22:29:46.000+08:00
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 # react-native-web-lists
 > React Native for Web implementation of Lists
 
+**DEPRECATED: `react-native-web` now support FlatList, this package is now useless.**
+
 This package uses the legacy implementation (ListView).
 
 ## Getting started
