Changes to Create a subtask

added the new required request property due_date

added the new required request property status

added the new required request property title

removed the success response with the status 200

added the new optional request property assignments

added the new optional request property customer_id

added the new optional request property description

added the new optional request property is_required_for_job

added the new optional request property is_template

added the new optional request property job_id

added the new optional request property project_id

added the new optional request property recurring_job_id

added the success response with the status 201