Test new behaviour of pylint by setting fail-under=7. See #30.

.gitlab-ci.yml

@@ -48,7 +48,7 @@ PEP8:
 Pylint:
   stage: linting
   allow_failure: true
-  script: find . -type f -name '*.py' | xargs pylint -rn --fail-under=8.5 # Find all python files and check the code with pylint.
+  script: find . -type f -name '*.py' | xargs pylint -rn --fail-under=7 # Find all python files and check the code with pylint.
 
 test:
   stage: testing