types: fix types error

src/plugins/elementPlus/index.ts

@@ -1,13 +1,13 @@
-import type { AppContext, Plugin } from 'vue'
+import type { App } from 'vue'
 
 // 需要全局引入一些组件，如ElScrollbar，不然一些下拉项样式有问题
 import { ElLoading, ElScrollbar } from 'element-plus'
 
-const plugins = [ElLoading] as Plugin[]
+const plugins = [ElLoading]
 
 const components = [ElScrollbar]
 
-export const setupElementPlus = (app: AppContext['app']) => {
+export const setupElementPlus = (app: App<Element>) => {
   plugins.forEach((plugin) => {
     app.use(plugin)
   })