Use moment.weekdaysMin() for weekdays

[jesenko]

Considering that moment is used for formatting of date-related stuff in datepicker (e.g. month+year in calendar header), why is it not used to obtain weekdays?

I am currently setting it as

const weekdays = moment.weekdaysMin()
<Datepicker weekdays={weekdays} />

I assume this would be sensible default - also taking into account locale property of <Datepicker />?

Current implementation also overrides moment locale setting with weekdays as set in Datepicker (https://github.com/Hacker0x01/react-datepicker/blob/master/src/calendar.jsx#L59), which can be rather surprising for the user of the component.

[RSO]

SGTM. Not sure if I can find the time to work on this, so a PR would be much appreciated.

[rafeememon]

Fixed by #277