[gitlab-ci] autogenerated from tox

.gitlab-ci.yml

+image: python
+
+before_script:
+  - pip install tox
+
+check-manifest:
+  script: tox -e check-manifest
+
+flake8:
+  script: tox -e flake8
+
+py3:
+  script: tox -e py3
+
+