Count weeks from a given date or between two dates.
Returns 0 for end date in the past.
Does only calculate from date and not time.
const wfd = require('@alheimsins/uker-fra-dato')
const start = new Date('2020-09-07')
const endOne = new Date('2020-09-13')
const endTwo = new Date('2020-09-14')
const endPast = new Date('2019-05-01')
console.log(wfd(start, endOne)) //=> 0
console.log(wfd(start, endTwo)) // => 1
console.log(wfd(start, endPast)) // => 0Created with ❤ for Alheimsins
