sets always slide tabindex to -1

[akashmdkml]

Is there any way to overwrite tabIndex to make slides accessible. please refer my use case https://codesandbox.io/s/myqq0yz54y
voiceover should read left-arrow --> current slide(active slide) --> next-arrow
to achieve this we should set current slide tabIndex to 0 and rest all slides tabIndex to -1

[LuigiClaudio]

There's a problem here https://github.com/akiran/react-slick/blob/master/src/slider.js#L183 where the slide content gets a tabindex value of '-1' - Also I could see on track.js some hard-coded values for the tabindex set once again to '-1': https://github.com/akiran/react-slick/blob/master/src/track.js although I think those work as intended.

[jons-disco]

Why is it set to -1 anyways. This breaks accessibility and is a sticking point for us to not use this library.