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* Sync all zeep requirements to 4.2.1
* Fix `test_010_create_mindata` to send `WebServerScriptNamePart` which is required now
* Allow defining shoptype as env variable for tests
* up Pipenv python version to 3.8
* refactor zeep utils to own file
* use local copy of soap-encodings as the server is not stable
* see: https://github.com/mvantellingen/python-zeep/issues/1417