Switch to setup.cfg due to deprecation of setup.py

.gitlab-ci.yml

@@ -134,11 +134,13 @@ deploy_production:
   image: python:3.10-bullseye
 
   before_script:
-    - pip install twine wheel
+    - python -m pip install --upgrade pip
+    - python -m pip install --upgrade build
+    - python -m pip install --upgrade setuptools wheel twine
 
   script:
-    - python setup.py sdist bdist_wheel
-    - twine upload dist/*
+    - python -m build
+    - python -m twine upload dist/*
 
   rules:
     - if: $CI_COMMIT_TAG