also install poppler

.gitlab-ci.yml

 image: gitlab.kwant-project.org:5005/qt/research-docker:latest
 
 scan arxiv:
-  when: manual
+  only: schedules
   before_script:
-    - conda install -y tweepy -c conda-forge
+    - conda install -y tweepy poppler -c conda-forge
   script:
     - python jet-detection.py

jet-detection.py

@@ -43,7 +43,7 @@ def preprint_ids():
             preprint['id'].split('abs/')[-1]
             for preprint in preprints
             if 'UPDATED' not in preprint['title']
-        ][:10]
+        ]
 
     return []