// Lists all Saturdays and Sundays in the given date interval
const result = eachWeekendOfInterval({
start: new Date(2018, 8, 17),
end: new Date(2018, 8, 30)
})
//=> [
// Sat Sep 22 2018 00:00:00,
// Sun Sep 23 2018 00:00:00,
// Sat Sep 29 2018 00:00:00,
// Sun Sep 30 2018 00:00:00
// ]