Add disabled dates

[Stelios Eglezos]

First of all thank you for creating this component, it works perfectly and it's beautiful.

I would like to ask for a feature to add disabled dates, for example i want users to select a date range for their booking appointment but i don't want to be possible to choose two same dates, so when a user clicks a date the date selected should be disabled to click again.

So it will work like this:

1. User selects date
2. Date which the user selected is disabled to select again in date picker range

Thank and regards.