doc: Update document.

README-zh.md

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 [![](https://img.shields.io/github/issues/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/issues) [![](https://img.shields.io/github/forks/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/network) [![](https://img.shields.io/github/stars/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/stargazers) [![](https://img.shields.io/github/release/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/releases) ![](http://jaywcjlove.github.io/sb/status/no-dependencies.svg) [![Build Status](https://www.travis-ci.org/jaywcjlove/hotkeys.svg?branch=master)](https://www.travis-ci.org/jaywcjlove/hotkeys) [![Coverage Status](https://coveralls.io/repos/github/jaywcjlove/hotkeys/badge.svg?branch=master)](https://coveralls.io/github/jaywcjlove/hotkeys?branch=master) [![jaywcjlove/sb](https://jaywcjlove.github.io/sb/lang/english.svg)](./README.md)
 
-这是一个强健的 Javascript 库用于捕获键盘输入和输入的组合键，它易于使用，没有依赖，压缩只有(~3kb)，gzip:1.73kb。[官方文档DEMO预览](http://jaywcjlove.github.io/hotkeys/?lang=cn)，[更多实例](https://github.com/jaywcjlove/hotkeys/issues?q=label%3ADemo+)。
+这是一个强健的 Javascript 库用于捕获键盘输入和输入的组合键，它易于使用，没有依赖，压缩只有([~3kb](https://bundlephobia.com/result?p=hotkeys-js))，gzip: 1.73kb。[官方文档DEMO预览](http://jaywcjlove.github.io/hotkeys/?lang=cn)，[更多实例](https://github.com/jaywcjlove/hotkeys/issues?q=label%3ADemo+)。
 
 
 ```shell

README.md

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 [![](https://img.shields.io/github/issues/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/issues) [![](https://img.shields.io/github/forks/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/network) [![](https://img.shields.io/github/stars/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/stargazers) [![](https://img.shields.io/github/release/jaywcjlove/hotkeys.svg)](https://github.com/jaywcjlove/hotkeys/releases) ![](http://jaywcjlove.github.io/sb/status/no-dependencies.svg) [![Build Status](https://www.travis-ci.org/jaywcjlove/hotkeys.svg?branch=master)](https://www.travis-ci.org/jaywcjlove/hotkeys) [![Coverage Status](https://coveralls.io/repos/github/jaywcjlove/hotkeys/badge.svg?branch=master)](https://coveralls.io/github/jaywcjlove/hotkeys?branch=master) [![jaywcjlove/hotkeys](https://jaywcjlove.github.io/sb/lang/chinese.svg)](./README-zh.md) [![jaywcjlove/hotkeys](https://jaywcjlove.github.io/sb/ico/gitee.svg)](https://gitee.com/jaywcjlove/hotkeys)
 
-HotKeys.js is an input capture library with some very special features, it is easy to pick up and use, has a reasonable footprint (~3kb) (gzipped: 1.73kb), and has no dependencies. It should not interfere with any JavaScript libraries or frameworks. Official document [demo preview](http://jaywcjlove.github.io/hotkeys). [More examples](https://github.com/jaywcjlove/hotkeys/issues?q=label%3ADemo+).
+HotKeys.js is an input capture library with some very special features, it is easy to pick up and use, has a reasonable footprint ([~3kb](https://bundlephobia.com/result?p=hotkeys-js)) (gzipped: 1.73kb), and has no dependencies. It should not interfere with any JavaScript libraries or frameworks. Official document [demo preview](http://jaywcjlove.github.io/hotkeys). [More examples](https://github.com/jaywcjlove/hotkeys/issues?q=label%3ADemo+).
 
 ```shell
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