Update README.md

Create-Peace · web-flow · commit f9e33cfc4b20 · 2021-09-02T23:02:00.000+08:00
diff --git a/README.md b/README.md
@@ -45,3 +45,6 @@ Property | Type | Description | Params
 ## Contributions
 
 Welcome to improve this component with any issue, pull request or code review.
+
+## License
+[MIT License](https://github.com/Create-Peace/vue-tree/blob/master/LICENSE).
