Datepicker can't display error/required messages

[timothyallan]

The majority of the components are able to display error/required messages via the import mapError from './map' statement, except for poor old DatePicker. It's never able to display an error message as the props are never mapped.

[erikras]

This is true. There is no mention of errorText in the DatePicker docs, so I did not implement it, but it does, in fact, work. This will be fixed in the next version.

[erikras]

Fixed in v4.0.0.