futureDate method
default 365*5 = 1825 days (5 year) random date from Today
Implementation
DateTime futureDate([int days = 5 * 365]) {
final int randomDays = nextInt(days);
final DateTime randomDate = DateTime.now()
.add(Duration(days: randomDays, seconds: nextInt(60 * 60 * 24)));
return randomDate;
}