ci: extras missing

.gitlab-ci.yml

@@ -33,7 +33,7 @@ before_script:
   - apt-get update -yqq
   - apt-get -o dir::cache::archives=".cache/apt" install -y -qq gfortran libopenblas-dev liblapack-dev
   - apt-get -o dir::cache::archives=".cache/apt" install -y -qq libgmp-dev
-  - poetry install --with docs # --extras extra we require
+  - poetry install --with docs --extras=io
   - source $(poetry env info -p)/bin/activate
 
 dist: