Want to add notification to the NotificationArgsProps type export

[HenryWong-fe]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

需要对notification做一些二次封装，但是目前看并没有提供notification的类型导出

What does the proposed API look like?

export { default as notification， NotificationArgsProps } from './notification';

[zkwolf]

2.2.2版本里应该完善了类型

[HenryWong-fe]

2.2.2版本里应该完善了类型

很显然 2.2.2版本中依旧存在多个组件未导出type类型的情况

[zkwolf]

重构中的组件基本就顺便加了，还没加的有需求可以单独提一下

[kortin99]

same issue

"dependencies": {
    "ant-design-vue": "^3.2.12"
}