Button: Missing types on ButtonGroup like `className`

[syradar]

Bug already reported ?

• [X] I confirm that I have checked if the bug already has been reported

For which framework/library you are reporting the bug

React

Component name

ButtonGroup

Description

It seems like the regular HTMLElement props are not being forwarded to the underlying element for ButtonGroup.

I got the error following the docs for ButtonGroup

Steps To Reproduce

1. Use TypeScript
2. Add className to the ButtonGroup

Current Behaviour

Complains that className is not a valid prop on ButtonGroup

Expected Behaviour

It should either:

• Accept className and forward them to the underlying element.
• Accept a buttonGroupSize property that controls the size of the ButtonGroup.