Returns a Duration
representing the amount of time between two dates.
function durationFromDates(dateA: Date, dateB: Date)
// Example:
const now = new Date()
const fiveMinutesAgo = new Date(Date.now() - 60 * 1000 * 5)
durationFromDates(now, fiveMinutesAgo)
//=> { days: 0, hours: 0, minutes: 5, seconds: 0 }