Update README.md

Author: artdong

README.md

@@ -1,5 +1,11 @@
 # react-org-tree
 
+[![npm version](https://badge.fury.io/js/react-org-tree.svg)](https://badge.fury.io/js/react-org-tree)
+[![mnt-image](https://img.shields.io/maintenance/yes/2020.svg)](../../commits/master)
+[![GitHub stars](https://img.shields.io/github/stars/artdong/react-org-tree.svg)](https://github.com/artdong/react-org-tree/stargazers)
+[![GitHub forks](https://img.shields.io/github/forks/artdong/react-org-tree.svg)](https://github.com/artdong/react-org-tree/network)
+[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/artdong/react-org-tree/blob/master/LICENSE)
+
 > A simple organization tree component based on react
 
 ### Installation