Cannot set month range without callback

[tizbac]

https://github.com/tizisdeepan/EventsCalendar/blob/7616af517c6aeee4c92ad0e70f8dbcb6481125c4/eventscalendar/src/main/java/com/events/calendar/views/EventsCalendar.kt#L94

If callback is not set, there's no way to set month range, makes no sense for me