Lazypredict

- Updated the default version to 3.9

- Fixed issue with older version of Scikit-learn
- Reduced dependencies sctrictly to few

- Removed StackingRegressor and CheckingClassifier.
- Added provided_models method.
- Added adjusted r-squared metric.
- Added cardinality check to split categorical columns into low and
high cardinality features.
- Added different transformation pipeline for low and high cardinality
features.
- Included all number dtypes as inputs.
- Fixed dependencies.
- Improved documentation.

- Removed catboost regressor and classifier

- Added xgboost, lightgbm, catboost regressors and classifiers

- Removed troublesome regressors from list of CLASSIFIERS