Update README.md

Author: Mechazawa

README.md

@@ -4,6 +4,11 @@ vue2-teleport
 
 This package is an alternative to [vue3's teleport component][oc-teleport]. You can use the documentation provided by vue as a starting point to using this package.
 
+## Installation
+```sh
+npm install vue2-teleport
+```
+
 ## Example
 
 ```
@@ -43,4 +48,10 @@ export default {
 </script>
 ```
 
+## License
+
+This project is licensed under the [CC0-1.0 License][license].
+
+
+[license]: /LICENSE
 [oc-teleport]: https://vuejs.org/guide/built-ins/teleport.html