A user can set a due date

[fynnfeldpausch]

As a user, I want to set a due date for my tasks so that I can start working on my urgent tasks first.

Acceptance criteria

• the user can set a due date for a task
• the task list is sorted by due date
  • tasks with a due date go to the top of the list
  • tasks without a due date go to the bottom of the list

Optional acceptance criteria

• the user can also set a due time for a task

Additional information
We prefer quality over quantity. Clean code is a given. We expect all test to run.