Add "deadline" as an option to "show" property

[GoldwingDesigns]

Is your feature request related to a problem? Please describe.
Todoist introduced new "deadline" feature. It would be nice if this plugin supported "showing" the deadline

Describe the solution you'd like
Add an option to the "show" array for deadlines.

Describe alternatives you've considered
I could set dates, but according to https://todoist.com/help/articles/introduction-to-deadlines-uMqbSLM6U the new deadlines feature is supposed to support task deadlines where the old "date" field supports a start date.

Additional context
Thank you for your consideration and hard work!