Explicitly install setuptools for pypi deployment

.gitlab-ci.yml

@@ -175,7 +175,7 @@ pypi:
     TWINE_USERNAME: $PYPI_USER
     TWINE_PASSWORD: $PYPI_PASS
   script:
-    - pip install -U twine
+    - pip install -U setuptools twine
     - python setup.py sdist bdist_wheel
     - twine upload dist/*
 
@@ -188,6 +188,6 @@ gitlab:
     - small
   image: python
   script:
-    - pip install -U twine
+    - pip install -U setuptools twine
     - python setup.py sdist bdist_wheel
     - TWINE_USERNAME=gitlab-ci-token TWINE_PASSWORD=${CI_JOB_TOKEN} twine upload --verbose --skip-existing --repository-url https://gitlab.inria.fr/api/v4/projects/${CI_PROJECT_ID}/packages/pypi dist/*