Disable/blur old dates

[nandorojo]

It would be nice to have a boolean that doesn't allow you to click dates before today (i.e. a minDate: new Date()). It could then reduce the opacity of the hidden dates, so users know not to click them.

[nandorojo]

I think a good strategy could be to use the validRange API from FullCalendar: https://fullcalendar.io/docs/validRange

const validRange = {
  start: '2020-05-01', // optional
  end: '2020-08-01' // optional
}

[nandorojo]

Opened a PR to close this at #49.

CC @RichardLindhout

Thanks!

[RichardLindhout]

Ok perfect! Thank you a lot I have some feedback but looking great so far