Resolve "Create a rule that gets the construction date from cadaster data for Tabula dataset."

Closes #20 (closed)

\approve @ds @laurens @chengzhi

.gitlab-ci.yml

@@ -22,7 +22,6 @@ linters:
     - virtualenv venv
     - source venv/bin/activate
     - pip3 install black pylint flake8
-    - pip3 config set global.extra-index-url https://git.gfz-potsdam.de/api/v4/projects/2940/packages/pypi/simple
   script:
     - flake8 --max-line-length=$LINE_LENGTH $SOURCES
     - black --check --line-length $LINE_LENGTH $SOURCES