docs: fix size badge

readme.md

@@ -2,7 +2,7 @@
 
 # Immer
 
-[![npm](https://img.shields.io/npm/v/immer.svg)](https://www.npmjs.com/package/immer) [![size](http://img.badgesize.io/https://cdn.jsdelivr.net/npm/immer/dist/immer.umd.js?compression=gzip)](http://img.badgesize.io/https://cdn.jsdelivr.net/npm/immer/dist/immer.umd.js) [![Build Status](https://travis-ci.org/immerjs/immer.svg?branch=master)](https://travis-ci.org/immerjs/immer) [![Coverage Status](https://coveralls.io/repos/github/immerjs/immer/badge.svg?branch=master)](https://coveralls.io/github/immerjs/immer?branch=master) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier) [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/michelweststrate)
+[![npm](https://img.shields.io/npm/v/immer.svg)](https://www.npmjs.com/package/immer) [![Build Status](https://travis-ci.org/immerjs/immer.svg?branch=master)](https://travis-ci.org/immerjs/immer) [![Coverage Status](https://coveralls.io/repos/github/immerjs/immer/badge.svg?branch=master)](https://coveralls.io/github/immerjs/immer?branch=master) [![Minzipped size](https://img.shields.io/bundlephobia/minzip/immer.svg)](https://bundlephobia.com/result?p=immer) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier) [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.me/michelweststrate)
 
 _Create the next immutable state tree by simply modifying the current tree_