add polars to dev requirements

settings.ini

@@ -21,7 +21,7 @@ ray_requirements = fugue[ray]>=0.8.1 protobuf>=3.15.3,<4.0.0
 dask_requirements = fugue[dask]>=0.8.1
 spark_requirements = fugue[spark]>=0.8.1
 plotly_requirements = plotly plotly-resampler
-dev_requirements = nbdev black mypy flake8 ray<2.8 protobuf>=3.15.3,<4.0.0 matplotlib pmdarima prophet scikit-learn fugue[dask,ray,spark]>=0.8.1 datasetsforecast supersmoother nbdev_plotly
+dev_requirements = nbdev black mypy flake8 ray<2.8 protobuf>=3.15.3,<4.0.0 matplotlib pmdarima polars prophet pyarrow scikit-learn fugue[dask,ray,spark]>=0.8.1 datasetsforecast supersmoother nbdev_plotly
 nbs_path = nbs
 doc_path = _docs
 recursive = True