Would like the option to add a highlighted day / days

[stevenbriscoeca]

Is your feature request related to a problem? Please describe.
It seems impossible for me to select a date and add a class so i can stylize said date. So let's say I want to indicate to the user a specific date or dates I want highlighted I cannot now.

Describe the solution you'd like
Possible to pass a date / dates in a array that duet would add a class to the html so I can stylise it.
https://litepicker.com/docs/options#highlighteddays-114