Update package

[ReinierKoops]

Hi, love your package. Will it receive an update so its in sync with SHAP? Preferably it would be nice if we could distill the computation and perhaps propose a PR for SHAP, since keeping up to date with shap might be infeasible.

For example when running Fasttreeshap I found a bug related to Lightgbm where if the data contained categorical values it wouldn't run: shap/shap#2144

This is fixed in the latest shap but not in FastTreeSHAP.