bower: bump moment to 2.20.1, which includes Chinese fixes
bower: bump moment to 2.20.1, which includes Chinese fixes

oleg-babintsev/fullcalendar,fullcalendar/fullcalendar,arshaw/fullcalendar,fullcalendar/fullcalendar,fullcalendar/fullcalendar,oleg-babintsev/fullcalendar,fullcalendar/fullcalendar,arshaw/fullcalendar,arshaw/fullcalendar,oleg-babintsev/fullcalendar,arshaw/fullcalendar