Updated minimum sklearn version to 0.22 (autogluon#521)

Tabular: Refactored hyperparameter configuration + Various fixes (aut…

…ogluon#489)

* Tabular: Refactored hyperparameter configuration + Various fixes

* Improved CatBoost runtime when data has many features

* Addressed Comments

* Removed unnecessary warnings

Updated version to 0.0.9 (autogluon#460)

* Updated version to 0.0.9

* Capped maximum version of scikit-learn and catboost

Fix Version File and Auto Upload to PyPi (autogluon#457)

Tabular: Added presets, save_bagged_models, keep_only_best, and save_…

…space (autogluon#453)

* Tabular: Added presets, save_bagged_models, keep_only_best, and save_space parameters

* Improved redundant training of refit models when they would be deleted.

* Addressed Comments

* Potentially fixed documentation, addressed comments.

* Improved doc formatting

Updated version to 0.0.6 (autogluon#367)