Replace div elements for native button elements

[tomasvn]

Is there an existing issue for this?

• I have searched the existing issues

Code of Conduct

• I agree to follow this project's Code of Conduct

Feature Request

- Benefits - focus, will be properly announce when using screen reader
- I would open a PR into your repo

nuka-carousel/packages/nuka/src/Carousel/NavButtons.tsx

Line 27 in 776b32f

<div className={prevNavClassName} onClick={goBack}>