Update README.md

Author: artdong

README.md

@@ -1,6 +1,6 @@
 # react-org-tree
 
-[![npm version][npm-image]][npm-url] [![mnt-image](https://img.shields.io/maintenance/yes/2021.svg?style=flat-square)](../../commits/master) [![GitHub stars](https://img.shields.io/github/stars/artdong/react-org-tree.svg?style=flat-square)](https://github.com/artdong/react-org-tree/stargazers) [![GitHub forks](https://img.shields.io/github/forks/artdong/react-org-tree.svg?style=flat-square)](https://github.com/artdong/react-org-tree/network) [![npm download][download-image]][download-url] [![dumi](https://img.shields.io/badge/docs%20by-dumi-blue?style=flat-square)](https://github.com/umijs/dumi) [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://github.com/artdong/react-org-tree/blob/master/LICENSE)
+[![npm version][npm-image]][npm-url] [![mnt-image](https://img.shields.io/maintenance/yes/2022.svg?style=flat-square)](../../commits/master) [![GitHub stars](https://img.shields.io/github/stars/artdong/react-org-tree.svg?style=flat-square)](https://github.com/artdong/react-org-tree/stargazers) [![GitHub forks](https://img.shields.io/github/forks/artdong/react-org-tree.svg?style=flat-square)](https://github.com/artdong/react-org-tree/network) [![npm download][download-image]][download-url] [![dumi](https://img.shields.io/badge/docs%20by-dumi-blue?style=flat-square)](https://github.com/umijs/dumi) [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://github.com/artdong/react-org-tree/blob/master/LICENSE)
 
 [npm-image]: http://img.shields.io/npm/v/react-org-tree.svg?style=flat-square
 [npm-url]: http://npmjs.org/package/react-org-tree
@@ -114,4 +114,4 @@ react-org-tree is released under the MIT license.
 <p align='center'>
   <a href="https://www.buymeacoffee.com/artd" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/arial-violet.png" alt="Buy Me A Coffee" style="height: 51px !important;width: 217px !important;" >
   </a>
-</p>
+</p>