Allow aria props

I saw that aria-label and aria-labelledby are accepted props to the component, but there are a number of others that are required based on a given element’s state. It would be nice if:

1. All aria-* props are explicitly whitelisted, OR
2. The component used the ...restProps syntax to allow passing any unanticipated properties to the component without the need to whitelist them individually

The specific prop that I came here about is aria-checked, which is required for checkbox inputs (see https://dequeuniversity.com/rules/axe/3.1/aria-required-attr).

[markusenglund]

Ok. Yeah, the best solution is probably to let people pass any prop they want straight to the input/checkbox element of the component. We could facilitate that by using the object …spread syntax. I have been reluctant to do that because it adds a fair bit of size to the component after babel transpiles it, but it seems like it would be worth the cost.

[JaeYeopHan]

@markusenglund Thanks! very helpful!