[ci] add continuous integration

Squashed commit of the following:

commit e7b303310f3726c4ec5b36db668f7a5aaee29287
Author: Maxime Alves LIRMM <maxime.alves@lirmm.fr>
Date:   Thu Sep 2 10:35:16 2021 +0200

    fix gitlab-ci run

commit 360c03371f1b088ce883646799f829a50f7a04a8
Author: Maxime Alves LIRMM <maxime.alves@lirmm.fr>
Date:   Thu Sep 2 08:26:51 2021 +0000

    Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -0,0 +1,41 @@
+# This file is a template, and might need editing before it works on your project.
+# To contribute improvements to CI/CD templates, please follow the Development guide at:
+# https://docs.gitlab.com/ee/development/cicd/templates.html
+# This specific template is located at:
+# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Python.gitlab-ci.yml
+
+# Official language image. Look for the different tagged releases at:
+# https://hub.docker.com/r/library/python/tags/
+image: python:3.8
+
+# Change pip's cache directory to be inside the project directory since we can
+# only cache local items.
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+
+# Pip's cache doesn't store the python packages
+# https://pip.pypa.io/en/stable/reference/pip_install/#caching
+#
+# If you want to also cache the installed packages, you have to install
+# them in a virtualenv and cache it as well.
+cache:
+  paths:
+    - .cache/pip
+    - venv/
+
+before_script:
+  - python -V  # Print out python version for debugging
+  - pip install pipenv
+  - pipenv install  --dev --skip-lock
+
+test:
+  script:
+    - pipenv run pytest -v
+
+run:
+  script:
+    - pipenv run python -m build --sdist
+    - pipenv run python -m build --wheel
+  artifacts:
+    paths:
+      - dist/*.whl