ci: Set up CI pipelines for running tests, analyses and publish to PyPi

.gitlab-ci.yml

+image: python:latest
+
+stages:
+  - Static Analysis
+  - Test
+  - Release
+
+flake8:
+  stage: Static Analysis
+  script:
+  - pip install flake8
+  - python -m flake8 --statistics --count .
+  allow_failure: true
+
+test:
+  stage: Test
+  image: $IMAGE
+  parallel:
+    matrix:
+      - IMAGE: ['python:3.6', 'python:3.7']
+  script:
+    - pip install tox flake8
+    - python -m tox
+
+pypi:
+    stage: Release
+    script:
+        - pip install -U twine
+        - python setup.py sdist
+        - twine upload dist/*
+    only:
+        - tags

LICENSE

-(c) 2020 CERN
+(c) 2020 - 2021 CERN
 
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007

pyproject.toml

@@ -4,7 +4,7 @@ line-length = 89
 [tool.tox]
 legacy_tox_ini = """
 [tox]
-envlist = py36
+envlist = py
 [testenv]
 deps = pytest
 commands = pytest

setup.cfg

+[metadata]
+description-file = README.md