In this kata, we will make a function to test whether a period is late.
Our function will take three parameters:
last - The Date object with the date of the last period
today - The Date object with the date of the check
cycleLength - Integer representing the length of the cycle in days
Return true if the number of days passed from last to today is greater than cycleLength. Otherwise, return false.
def period_is_late(last,today,cycle_length)
today - last > cycle_length
end