Type(Upload): RcCustomRequestOptions in Upload component no longer exported

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

Steps to reproduce

Use the Dragger component from Upload (with Typescript) and pass a custom function to the customRequest prop (as in don’t pass an inline arrow function). If you want to use RcCustomRequestOptions which the prop requires it is no longer being exported. Exact error is /antd/lib/upload/interface"' declares 'RcCustomRequestOptions' locally, but it is not exported.

What is expected?

I’d expect to still have access to the interface needed to satisfy the prop

What is actually happening?

The interface is no longer exported from antd

Environment	Info
antd	4.10.0
React	17.0.1
System	Mac osx 11.0.1
Browser	Chrome 87.0.4280.88

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I don’t know if this was intentional or not and I can’t find the commit that changed this but I don’t believe it should be enforced to use an inline arrow function to satisfy typescript in this scenario. I see the change was that the interface is being pulled from the actual rc-upload library instead of being manually defined in antd, but would prefer not to have install that just to have access to this 1 interface

[duskmoon314]

Could you please export something like this so developers can use when using Upload in typescript?

[zombieJ]

RcCustomRequestOptions is internal type define that we do not want to open to the public. We may not maintain the interface with RC prefix since it’s all from the rc-component that we only rename not to conflict with internal define.

This may not fix since it may leave too many legacy interface define in interface file.

Sorry about that.