Antoni Duda

ColumnTransformer _hstack incompatible with scikit's version

1

**Describe the issue**: The current [dask_ml's transformer's _hstack method](https://github.com/dask/dask-ml/blob/8e2fbb2843c93f415079be2fa93132823d2a547d/dask_ml/compose/_column_transformer.py#L172) has different signature than the [method from scikit](https://github.com/scikit-learn/scikit-learn/blob/98ed9dc73a86f5f11781a0e21f24c8f47979ec67/sklearn/compose/_column_transformer.py#L1116) - it lacks the n_samples argument. **Minimal Complete Verifiable Example**: ```python from dask_ml.wrappers...