chore: prefer using extend (#8531)

src/composables/use-expose.ts

@@ -1,9 +1,10 @@
 import { getCurrentInstance } from 'vue';
+import { extend } from '../utils';
 
 // expose public api
 export function useExpose(apis: Record<string, any>) {
   const instance = getCurrentInstance();
   if (instance) {
-    Object.assign(instance.proxy, apis);
+    extend(instance.proxy, apis);
   }
 }