Support for RandomForestQuantileRegressor

[Isaac Newton K.]

In my thesis, I tried to use FastTreeSHAP to explain RandomForestQuantileRegressor , i get the following error:

_Exception: Model type not yet supported by TreeExplainer: <class 'quantile_forest.quantile_forest.RandomForestQuantileRegressor'>

For this reason, I have to drop using FastTreeSHAP which is sad.