react-spectrum

a0f0604e - add allowsEmptyCollection property to interface (#5842)

add allowsEmptyCollection property to interface (#5842) Co-authored-by: John Svensson <john.svensson@btwentyfour.com> Co-authored-by: Daniel Lu <dl1644@gmail.com> Co-authored-by: Reid Barber <reid@reidbarber.com>