Fix React ref type

[alexandernanberg]

Fix ref types for React

E.g. this should be valid

function App() {
  const ref = useRef<SVGSVGElement | null>(null)
  return <Icon ref={ref} />
}

Also changes React.ComponentProps<'svg'> to React.SVGProps<SVGSVGElement> which is what React internally uses for <svg> elements

[thecrypticace]

Thanks!