Range select support

**Is your feature request related to a problem? Please describe.**
Being able to show only one calendar to select a Start and an End dates.

**Describe the solution you'd like**
Set an Input to specify if this is a range calendar, then when you click the first date, it is a Start date, when you select the secnd date this will be the End date. then, paint (change background) the middle dates.

**Describe alternatives you've considered**
Showing two calendars to accomplish this, one to select Start, another to select End.

**Additional context**