Add versioneer to CI pipeline dependencies

This change updates the .gitlab-ci.yml file to include versioneer in the pipeline dependencies. It ensures proper version management during the build process. The renaming of `versioneer.py` to `versioneer.py.bak` is likely related to this adjustment.

.gitlab-ci.yml

@@ -4,6 +4,6 @@ run-default:
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
   script:
-    - pip install build twine
+    - pip install build twine versioneer
     - python -m build
     - TWINE_PASSWORD=${CI_JOB_TOKEN} TWINE_USERNAME=gitlab-ci-token python -m twine upload --repository-url ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/pypi dist/*