feat: add license

Create-Peace · Create-Peace · commit 82de3ac30708 · 2021-09-02T22:52:45.000+08:00
diff --git a/README.md b/README.md
@@ -45,3 +45,5 @@ 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).
