Whisper component: must be made clear that the 'children' prop must support ref prop through React.forwardRef

[lfa9603]

Whenever a custom component is used as Whisper children, the custom component must support referencing using forwardRef.
While it's clear that the speaker component must do so, it can't be said the same about the children prop.

Hence, I propose we add a few lines specifying that custom components that are used as Whisper children must be of type RsRefForwardingComponent<,> or any other component type that is aware of the ref prop.

[simonguo]

There is a description of this issue in the documentation
https://rsuitejs.com/guide/composition/#caveat-with-refs

[lfa9603]

Awesome thanks, I would suggest we add a line at the beginning of the Whisper docs mentioning Whisper children prop having to conform to the mentioned caveat. I am happy to open a Pull Request for it if this sounds reasonable.

[simonguo]

You are welcome to submit PRs to improve rsuite components and documentation.