Feature Request: Optionally tab through slides

Is your feature request related to a problem? Tabbing through the slides does not work correctly because a tabindex of -1 is added to each slide. I'm sure this was done for a good reason, but I'd be curious to hear why.

Describe the solution you'd like I would like to see an option added to the API Config to make that an optional feature. We need to be able to tab through the carousel slides for our site.

If any, describe the alternatives you've considered Alternatives would be manually editing the source code and hosting our own modified copy or switching to a different plugin.

Teachability, Documentation, Adoption, Migration Strategy Users can set an option like tabIndexNegOne to true or false in the initialization of the plugin.