Enable colour output

.gitlab-ci.yml

@@ -43,7 +43,7 @@ pytest:
   <<: *before_script
   script:
     - python3 -m pip install ".[test]"
-    - python3 -m pytest --verbose --cov=cal_tools --cov=xfel_calibrate
+    - python3 -m pytest --color yes --verbose --cov=cal_tools --cov=xfel_calibrate
 #  Nope... https://docs.gitlab.com/12.10/ee/user/project/merge_requests/test_coverage_visualization.html#enabling-the-feature
 #    - coverage xml
 #  artifacts:
@@ -56,4 +56,4 @@ cython-editable-install-test:
   <<: *before_script
   script:
     - python3 -m pip install -e ".[test]"
-    - python3 -m pytest ./tests/test_agipdalgs.py
+    - python3 -m pytest --color yes --verbose ./tests/test_agipdalgs.py