rasbt/mlxtend: Version 0.12.0

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• A new feature_importance_permuation function to compute the feature importance in classifiers and regressors via the permutation importance method (#358)
• The fit method of the ExhaustiveFeatureSelector now optionally accepts **fit_params for the estimator that is used for the feature selection. (#354 by Zach Griffith)
• The fit method of the SequentialFeatureSelector now optionally accepts **fit_params for the estimator that is used for the feature selection. (#350 by Zach Griffith)

• Replaced plot_decision_regions colors by a colorblind-friendly palette and adds contour lines for decision regions. (#348)
• All stacking estimators now raise NonFittedErrors if any method for inference is called prior to fitting the estimator. (#353)
• Renamed the refit parameter of both the StackingClassifier and StackingCVClassifier to use_clones to be more explicit and less misleading. (#368)

• Various changes in the documentation and documentation tools to fix formatting issues (#363)
• Fixes a bug where the StackingCVClassifier's meta features were not stored in the original order when shuffle=True (#370)
• Many documentation improvements, including links to the User Guides in the API docs (#371)