test: minimum versions (#1617)

* test minimum versions

* don't remove show-deps

---------

Co-authored-by: Marco Edward Gorelli <[email protected]>

Author: DeaMariaLeon

.github/workflows/extremes.yml

@@ -31,6 +31,15 @@ jobs:
           uv pip install -e ".[dev]" --system
       - name: show-deps
         run: uv pip freeze
+      - name: Assert dependencies
+        run: |
+          DEPS=$(uv pip freeze)
+          echo "$DEPS" | grep 'pandas==0.25.3'
+          echo "$DEPS" | grep 'polars==0.20.3'
+          echo "$DEPS" | grep 'numpy==1.17.5'
+          echo "$DEPS" | grep 'pyarrow==11.0.0'
+          echo "$DEPS" | grep 'scipy==1.5.0'
+          echo "$DEPS" | grep 'scikit-learn==1.1.0'
       - name: Run pytest
         run: pytest tests --cov=narwhals --cov=tests --cov-fail-under=50 --runslow