cli.py:
+ added --file argument to specify the todo file.
~ changed the --task handler to use get_task instead.
~ fixed bug w/ printing information on tasks w/ no due date.
TodoObject.py:
~ modified type-hinting on get_tasks.
~ modified type-hinting on get_task.
~ fixed bug with get_task returning type Task rather than found task.
~ fixed bug with get_note not listening to the immediate parameter.