Add generic completion of any task #90
Description
See: https://docs.camunda.org/manual/7.17/reference/rest/task/post-complete/
As process tester I want to complete any task. At the moment I can only complete external task.
Unfortunately, CamundaLibrary had focuesed on external tasks and named the completion keyword for external tasks Complete Task which would be indeed perfect for the functionality required in this issue.
Maybe add an optional argument task_id to complete_task keyword. If the id is given, call the generic completion endpoint.