plot_posterior_predictive: keyword normed is deprecated in matplotlib

[ilykos]

~/.local/lib/python3.8/site-packages/hddm/models/base.py in plot_posterior_predictive(self, *args, **kwargs)
    766         if 'value_range' not in kwargs:
    767             kwargs['value_range'] = np.linspace(-5, 5, 100)
--> 768         kabuki.analyze.plot_posterior_predictive(self, *args, **kwargs)
    769 
    770     def plot_posterior_quantiles(self, *args, **kwargs):
~/.local/lib/python3.8/site-packages/kabuki/analyze.py in plot_posterior_predictive(model, plot_func, required_method, columns, save, path, figsize, format, num_subjs, **kwargs)
    558                 ax.set_title(str(bottom_node['subj_idx']))
    559 
--> 560             plot_func(bottom_node['node'], ax, **kwargs)
    561 
    562             if num_subjs is not None and i >= num_subjs:
~/.local/lib/python3.8/site-packages/kabuki/analyze.py in _plot_posterior_pdf_node(bottom_node, axis, value_range, samples, bins, normed)
    476     # Plot data
    477     if len(bottom_node.value) != 0:
--> 478         axis.hist(bottom_node.value.values, normed=True, color='r',
    479                   range=(value_range[0], value_range[-1]), label='data',
    480                   bins=bins, histtype='step', lw=2.)

Keyword normed is deprecated in matplotlib and replaced by density.