Accessibility

Hello, thank you for this plugins! the JSON-ld is a big plus!
It would be great to make it fully accessible
adding button, aria-expanded, aria-labelledby …
Here some good examples:
https://van11y.net/accessible-accordion/
and the w3c design pattern
https://www.w3.org/TR/wai-aria-practices/#accordion
In the end is not so complicated to implement and is a huge difference if you are using a screen reader.
Let me known what you think about it.
bests
Paolo