v1.0.4

Stable release for due_date.

News:

Release of the API:

final date = DateTime(2022, DateTime.january, 31);
DueDateTime dueDate = DueDateTime.fromDate(date);
dueDate = dueDate.addMonths(1); // February 28th, 2022
dueDate = dueDate.addMonths(1); // March 31th, 2022