Optbinning

Bugfixes:

- Fix binning process summary update (151 ).

- Fix pandas 1.4.0 (python > 3.8) slicing issue with method at (148).

- Fix minor typos (147 ).

- Fix binning plot for multiple special values.

New features:

- Treatment of special codes separately for optbinning classes (115 ).

Bugfixes:

- Various bug fixes for the ``OptimalBinning2D`` class. See 138 for instance.

Tutorials

- Tutorial: optimal binning 2D with binary target

Improvements:

- Do not store optimization solver instance as class attribute.
- Do not store logger as a class attribute.

New features:

- Binning process supports ``sample_weight`` for binary target. 124

- Binning process can fix variables not satisfying selection criteria. 123

New features:

- Optimal binning 2D with binary target.

Improvements:

- Update bin string format in binning tables.
- Simplify logic when ``style="actual"`` in binning table plots.


API changes:

- Scorecard fit method arguments changed to the usual ``(X, y)``: 111

New features:

- Counterfactual explanations for scorecard modelling.

Improvements:

- Replace pickle by dill in save and load methods.

Bugfixes:

- Parallel binning uses joblib: 103
- Fix custom ``metric_special`` and ``metric_missing`` in binning_transform_params.