Force plot cmap not applied when matplotlib=True

[slobodaapl]

fig = shap.force_plot(base_value=explainer.expected_value[1], shap_values=shap_values[1], features=Xtr,
                          matplotlib=True, show=False, contribution_threshold=0.08, plot_cmap=["#f26522", "#44c5df"])

When matplotlib=True, the passed cmap values aren't used. I inspected the code and realize that it is not done at all in matplotlib when the figure is generated. It would be beneficial to provide a warning to output that matplotlib with cmap isn't supported, or for the feature to be added so that the color map is used.