Update README.md

Project retirement note

README.md

@@ -1,3 +1,7 @@
+# ⚠️ Retired
+
+Please consider using https://github.com/Andarist/react-textarea-autosize. There's an insurmountable issue with this approach in https://github.com/rpearce/react-expanding-textarea/issues/82 that is solved by `react-textarea-autosize`.
+
 # react-expanding-textarea
 
 [![All Contributors](https://img.shields.io/badge/all_contributors-24-orange.svg?style=flat-square)](#contributors-) [![npm version](https://img.shields.io/npm/v/react-expanding-textarea.svg?style=flat-square)](https://www.npmjs.com/package/react-expanding-textarea) [![npm downloads](https://img.shields.io/npm/dm/react-expanding-textarea.svg?style=flat-square)](https://www.npmjs.com/package/react-expanding-textarea) [![bundlephobia size](https://flat.badgen.net/bundlephobia/minzip/react-expanding-textarea)](https://bundlephobia.com/result?p=react-expanding-textarea)