This PR adds two functions to DateRule: quarterly and semiannually. The first function increments a start date in 3-month intervals. The second function increments the start date by 6-month intervals.
I had a need for these two functions at work. Since I already implemented these as extension traits at work, I figured I would contribute the same change to the core package. Feel free to merge or discard.
This PR adds two functions to
DateRule
:quarterly
andsemiannually
. The first function increments a start date in 3-month intervals. The second function increments the start date by 6-month intervals.