Timeago.since constructor
Timeago.since(})
Implementation
Timeago.since(DateTime since,
{this.lang,
this.showSeconds = true,
this.showMinutes = true,
this.showHours = true,
this.showDays = true,
this.showWeeks = false,
this.showMonths = true,
this.showYears = true})
: duration = DateTime.now().difference(since);