formatDistanceToNow behavior around the month of February

[prios-rob-taussig]

Just spent a bit of time scratching my head about a unit test failure the other day, and assumed that it had something to do with leap-year. Instead, it looks like February is not considered "about a month":

import { formatDistanceToNow, sub } from 'date-fns';

console.log(formatDistanceToNow(sub(new Date(), { months: 1 })));

// Called on any month besides March:
// "about one month"

// Called during the month of March:
// "29 days"

The above happens because one month ago from a day in March will be 28/29 days, which is less than the cutoff for "about one month" which is:

29 days 23 hrs 59 mins 30 secs ... 44 days 23 hrs 59 mins 30 secs

Maybe this is working as intended, but personally I think it would be better to decrease the floor to 27 days 23 hrs 59 mins 30 secs(if not explicitly considering whether the target date is February).