Release notes:
**Clustering**
- Optimal clustering computation with other metrics than `inertia` uses metrics scores for clusters >1
- `Silhouette` and `Calinski and Harabasz` scores are concave increasing (instead of convex decreasing)
**Classifier**
- `plot_shap_importances()` : pandas.DataFrame.append was deprecated in version 1.4.0. It has been replaced by pandas.concat