Change docker image to clarinpl

.gitlab-ci.yml

-image: python:3.9
+image: clarinpl/python:3.8
 
 cache:
   paths:
@@ -20,7 +20,7 @@ unittests:
   stage: test
   script:
     - pip install tox==4.12
-    - tox -p -e python3.9
+    - tox -p -e python3.8
 
 pypi_publish:
   before_script:

tox.ini

 [tox]
-envlist = python3.9
+envlist = python3.8
 skipsdist = True
 
 [testenv]