Merge branch 'fix_release_on_tagged_commit' into 'main'

Fix release on tagged commit

See merge request !12

.gitlab-ci.yml

 # we use the oldest compatible version
-image: python:3.9-slim
+image: python:3.8-slim
 
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
@@ -45,7 +45,7 @@ pypi:
       artifacts: true
   script:
       - pip install -U twine
-      - twine upload dist/*
+      - twine upload -u "$TWINE_USERNAME" -p "$TWINE_PASSWORD" dist/*
   rules:
     - if: '$CI_COMMIT_TAG =~ /^v\d{4}\.\d{1,2}\.\d{1,2}$/'
       # Always publish tagged commits matching CalVer