ci: drop python3.8, default python3.9, add python3.12

.gitlab-ci.yml

@@ -1,7 +1,7 @@
 # This file is a template, and might need editing before it works on your project.
 # Official language image. Look for the different tagged releases at:
 # https://hub.docker.com/r/library/python/tags/
-image: $CI_DOCKER_REGISTRY/python:3.8
+image: $CI_DOCKER_REGISTRY/python:3.9
 
 #commands to run in the Docker container before starting each job.
 before_script:
@@ -25,23 +25,22 @@ pytest:
   script:
     - pytest -v --random-order ./tests
 
-tests-3.9:
+tests-3.10:
   stage: AdditionalTests
-  image: $CI_DOCKER_REGISTRY/python:3.9
+  image: $CI_DOCKER_REGISTRY/python:3.10
   needs: ["pytest"]
   script:
     - pytest -v --random-order ./tests
   allow_failure: true
 
-tests-3.10:
-  extends: "tests-3.9"
-  stage: AdditionalTests
-  image: $CI_DOCKER_REGISTRY/python:3.10
-  allow_failure: true
-
 tests-3.11:
-  extends: "tests-3.9"
+  extends: "tests-3.10"
   stage: AdditionalTests
   image: $CI_DOCKER_REGISTRY/python:3.11
   allow_failure: true
-  
+
+tests-3.12:
+  extends: "tests-3.10"
+  stage: AdditionalTests
+  image: $CI_DOCKER_REGISTRY/python:3.12
+  allow_failure: true