Update README.md

Dongjin Jung · web-flow · commit e476ebb1b6eb · 2020-08-26T17:48:45.000+09:00
Add minzipped bundle size banner
diff --git a/README.md b/README.md
@@ -2,6 +2,7 @@
 
 
 [![minified size](https://img.shields.io/bundlephobia/min/sendbird-calls)](https://img.shields.io/bundlephobia/min/sendbird-calls)
+[![minzipped size](https://img.shields.io/bundlephobia/minzip/sendbird-calls)](https://img.shields.io/bundlephobia/minzip/sendbird-calls)
 [![npm version](https://badge.fury.io/js/sendbird-calls.svg)](https://badge.fury.io/js/sendbird-calls)
 [![Commercial License](https://img.shields.io/badge/license-Commercial-brightgreen.svg)](https://github.com/sendbird/sendbird-calls-javascript/blob/master/LICENSE.md)
 
