Mljar-supervised

Bug fixes
- 283 Don use Random Feature model

Enhancements
- 284 Check time for features selection
- 286 Add R2 score
- 288 Improve algorithms order in not_so_random step

Enhancements
- 274 limit number of iteration in CatBoost

Enhancements
- 92 add time checks
- 270 disable stacking for validation type split and repeats > 1
- 271 disable ldb model sort

Enhancements
- 223 Support for repeated validation
- 266 Adjust validation for small datasets

Bug fixes
- 265 fix validation warning
- 264 fix EDA tests
- 261 better error message for missing golden features

Dependencies
- 260 update fastparquet to 0.4.1

Bug fixes
- 258 Fix cant load automl when adjusted validation is used

Enhancements
- 250 New strategies for categorical encoding
- 257 Control algorithm order in not-so-random step

Bug fixes
- 255 Fix overwrite in adjusted models