修复公司类的子组件类型，统一为component接口，增强代码一致性

ts/src/composite/index.ts

@@ -20,7 +20,7 @@ class Department implements component {
 
 class Company implements component {
   name: string;
-  children: Company[] = [];
+  children: component[] = [];
   constructor(name: string) {
     this.name = name;
   }