ci: upload wheel and tarball to PyPI

closes #250

.gitlab-ci.yml

@@ -244,15 +244,20 @@ build-container:
 
 deploy_release:
   stage: deploy
-  image: $PRIMARY_IMAGE
+  image: python
   # needs: ["lookup-tables"]
   variables:
     TWINE_USERNAME: $PYPI_USERNAME
     TWINE_PASSWORD: $PYPI_PASSWORD
   before_script:
-    - pip install twine setuptools_scm
-    - python setup.py sdist
+    - python -m pip install
+          build
+          twine
   script:
-    - twine upload dist/*
+    # generate distributions
+    - python -m build
+    - ls dist/
+    # upload them
+    - python -m twine upload dist/*
   only:
     - tags