Use uv for dependency management

gitlab-ci/test.yml

@@ -4,15 +4,15 @@ python-tests:
   services:
     - postgres:15
     - memcached:1.5.22
-  image: python:3.9-bullseye
+  image: python:3.11
   before_script:
-    - pip install -r requirements/ci.txt
+    - uv pip install --requirement requirements/ci.txt
   script:
     - coverage run ./src/manage.py test newsreader
 
 javascript-tests:
   stage: test
-  image: node:16-bullseye
+  image: node:latest
   before_script:
     - npm install
   script: