feat: 🎸 export default with the install method

src/VueTreeList.vue

@@ -185,6 +185,7 @@ import {addHandler, removeHandler} from './tools.js'
 let compInOperation = null
 
 export default {
+  name: 'vue-tree-list',
   data: function() {
     return {
       isHover: false,

src/index.js

@@ -5,4 +5,9 @@
 import VueTreeList from "./VueTreeList";
 import { Tree, TreeNode } from "./Tree";
 
+VueTreeList.install = Vue => {
+  Vue.component(VueTreeList.name, VueTreeList);
+};
+
+export default VueTreeList;
 export { Tree, TreeNode, VueTreeList };