Improvement on get_stop_frequency_hourly

[gmatosferreira]

GTFShift/R/get_stop_frequency_hourly.R

Lines 106 to 113 in 389d7cd

	for (i in 6:23) {
	stop_frequency <- tidytransit::get_stop_frequency(
	gtfs_date,
	start_time = sprintf("%.2d:00:00", i),
	end_time = sprintf("%.2d:59:59", i),
	service_ids = service_ids,
	by_route = TRUE
	)

We could make the hour interval a parameter, or just return 0 to 23.

[temospena]

I would keep it as per each hour 0-23