restructure package

setup.cfg

 [metadata]
 name = airflow_datacat_integration
-version = 0.0.3
+version = 0.0.4
 author = Christian Boettcher
 author_email = c.boettcher@fz-juelich.de
 description = Datacatalog Integration for Apache Airflow
 long_description = file: README.md
 long_description_content_type = text/markdown
-url = https://github.com/pypa/sampleproject
+url = https://gitlab.jsc.fz-juelich.de/eflows4hpc-wp2/airflow-datacat-integration
 project_urls =
-    Issue Tracker = https://github.com/pypa/sampleproject/issues
+    Issue Tracker = https://gitlab.jsc.fz-juelich.de/eflows4hpc-wp2/airflow-datacat-integration/-/issues
 classifiers =
     Programming Language :: Python :: 3
     License :: OSI Approved :: BSD-2-Clause
     Operating System :: OS Independent
 
 [options]
-packages = datacat_integration
+packages = find:
+package_dir=
+    =src
 python_requires = >=3.7
 
 [options.packages.find]