Possibility to use h tags instead of role="heading" and aria-level

[sebpettersson]

"When possible, use native heading mark-up directly. For example, it is preferable to use <h1> rather than using <div role="heading" aria-level="1">"

It would be great to use semantically correct markup instead of relying on aria attributes.

Likewise, <div role="button" tabindex="0">" could just be <button>.

This is how the accordion example on w3.org is set up.

[holloway]

I believe this was done intentionally to avoid inheriting any styles, but I see your point.

[synecdokey]

Duplicate of #322