Change python versions

.gitlab-ci.yml

@@ -10,6 +10,7 @@ stages:
 
 before_script:
   - apt-get update -yqq
+    && apt install python3.8 python3.9 python3.10
     && apt-get install -yqq --no-install-recommends
     make
     g++
@@ -20,7 +21,7 @@ unittests:
   stage: test
   script:
     - pip install tox==4.12
-    - tox -r
+    - tox -p -e py38,py39,py310
 
 pypi_publish:
   before_script: