[CI] Do not require hashes when testing; install dev dependencies

.gitlab-ci.yml

@@ -19,7 +19,7 @@ test:
   before_script:
     - adduser --disabled-password --gecos "Test User" testuser
   script:
-    - sudo -u testuser sh -c 'poetry export -f requirements.txt | eatmydata pip install -r /dev/stdin'
+    - sudo -u testuser sh -c 'poetry export --without-hashes --dev -f requirements.txt | eatmydata pip install -r /dev/stdin'
     - sudo -u testuser eatmydata poetry run tox
 
 build_dist:
@@ -106,7 +106,7 @@ pages:
   image:
     name: registry.edugit.org/teckids/docker-images/python-pimped
   script:
-  - poetry export -f requirements.txt | eatmydata pip install -r /dev/stdin
+  - poetry export --without-hashes --dev -f requirements.txt | eatmydata pip install -r /dev/stdin
   - poetry run make -C docs html BUILDDIR=../public/docs
   artifacts:
     paths: