Fklearn

- **Enhancement**
- Now learners that have a model exposes it in the logs as `object` key

- **Enhancement**
- Make `custom_transformer` a pure function
- Remove unused requirements
- **New**
- Now features created by one hot enconding can be used in the next steps of pipeline
- Shap multiclass support
- Custom model pipeline
- **Bug Fix**
- Fix the way one hot encoding handle nans
- **Documentation**
- Minor fix flake8 documentation to make it work in other shells
- Fix fbeta_score_evaluator docstring
- Fix typo on onehot_categorizer
- New tutorial from meetup presentation

- **Enhancement**
- Validator accepts predict_oof as argument
- **New**
- Add CatBoosting regressor
- Data corruption(Macacaos)
- **Documentation**
- Multiple fixes in the documentation
- Add Contribution guide

- **Enhancement**
- Add predict_oof as argument to validator

- **Bug Fix**
- Fix warning in `placeholder_imputer`

- **Bug Fix**
- Fixing missing warner when there is no row with missing values