Type mismatch when assigning ref to TextField.TextArea

[zhyuhan]

Describe the bug
When trying to assign a ref of type HTMLTextAreaElement to a TextField.TextArea element, there is a type error of

Type 'HTMLTextAreaElement' is not assignable to type 'HTMLFormElement | ((el: HTMLFormElement) => void) | undefined'.
  Type 'HTMLTextAreaElement' is missing the following properties from type 'HTMLFormElement': acceptCharset, action, elements, encoding, and 11 more.ts(2322)

A similar type mismatch happens when using a callback for the ref prop.

To Reproduce
Steps to reproduce the behavior:

1. Declare a new ref variable with type HTMLTextAreaElement
2. Create a new TextField.TextArea element
3. Assign the variable to the ref prop of the TextArea
4. See TypeScript error

Expected behavior
There should be no type errors at all.

Additional context
Seems like the ref prop had the type HTMLTextAreaElement previously, but was changed to HTMLFormElement in #381. Was this intended?

[jer3m01]

Thanks for the report, HTMLTextAreaElement should extend HTMLFormElement and not cause any type errors but I might've been mistaken, I'll have a look and fix the type.