doc: Update README.md

Author: jaywcjlove

README.md

@@ -1,6 +1,12 @@
 React Markdown Preview
 ===
 
+[![](https://img.shields.io/github/issues/uiwjs/react-markdown-preview.svg)](https://github.com/uiwjs/react-markdown-preview/issues)
+[![](https://img.shields.io/github/forks/uiwjs/react-markdown-preview.svg)](https://github.com/uiwjs/react-markdown-preview/network)
+[![](https://img.shields.io/github/stars/uiwjs/react-markdown-preview.svg)](https://github.com/uiwjs/react-markdown-preview/stargazers)
+[![](https://img.shields.io/github/release/uiwjs/react-markdown-preview)](https://github.com/uiwjs/react-markdown-preview/releases)
+[![](https://img.shields.io/npm/v/@uiw/react-markdown-preview.svg)](https://www.npmjs.com/package/@uiw/react-markdown-preview)
+
 React component preview markdown text in web browser. The minimal amount of CSS to replicate the GitHub Markdown style. The current document is converted using this tool.
 
 ## Quick Start