TST: Add Python 3.11 to tox interpreters and pipeline

.gitlab-ci.yml

@@ -150,6 +150,12 @@ unittest_py310:
   image: python:3.10
   script: *python_test_script
 
+unittest_py310:
+  tags: [docker]
+  stage: unittest
+  image: python:3.10
+  script: *python_test_script
+
 # Build the sphinx documentation and make it ready for deployment by Gitlab Pages
 # Special job for serving a static website. See https://docs.gitlab.com/ee/ci/yaml/README.html#pages
 pages_prepare: &pages_prepare

tox.ini

 [tox]
-envlist=py38, py39, py310
+envlist=py38, py39, py310, py311
 skip_missing_interpreters = true
 
 [testenv]