fix ci

Author: lhoestq

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
         run: pip install --upgrade pyarrow huggingface-hub
       - name: Install depencencies (minimum versions)
         if: ${{ matrix.deps_versions != 'latest' }}
-        run: pip install pyarrow==6.0.1 huggingface-hub==0.2.0
+        run: pip install pyarrow==6.0.1 huggingface-hub==0.2.0 transformers
       - name: Test with pytest
         run: |
           python -m pytest -rfExX -m ${{ matrix.test }} -n 2 --dist loadfile -sv ./tests/