docker_extract.py is not handling relative directories very well.

Hi - I'm curious how up to date and stable this package is. It seems like parsing a CWL 1.2 workflow works in some ways but not others. I can parse a workflow when its stored unpacked, but can't parse a workflow when its packed. I can use load_document_by_uri but can't use cwl_utils.parser.cwl_v1_2.load_document

Depending on how a document is stored/loaded, I'm running into different issues traversing the workflow steps. I'm trying to use the docker_extract.py script as an example. I'm wondering if there is a right way of using this package and/or a wrong way.