Bump version v2.0.3 -> v2.0.4

Author: MBueschelberger

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = dsms_sdk
-version = v2.0.3
+version = v2.0.4
 description = Python SDK core-package for working with the Dataspace Management System (DSMS).
 long_description = file: README.md
 long_description_content_type = text/markdown