ErrorBars * Bars broken on matplotlib

[douglas-raillard-arm]

ALL software version info

holoviews: 1.14.4
jupyterlab: 2.3.1
bokeh: 2.3.2
matplotlib: 3.4.2

Description of expected behavior and the observed behavior

Error bars should be at the tip of the bars, not floating next to it.
Alignment is correct on bokeh but broken on matplotlib.

Complete, minimal, self-contained example code that reproduces the issue

import holoviews as hv

hv.extension('matplotlib')
cats = ['a', 'b']
levels = [3, 4]

bars = hv.Bars(zip(cats, levels)).opts(alpha=1)
errors = hv.ErrorBars(zip(cats, levels, [0.5, 0.2], [1.5, 1]), vdims=['y', 'yerrneg', 'yerrpos'])
fig = bars * errors
fig

Screenshots or screencasts of the bug in action

With matplotlib:

With bokeh:

Note that bokeh error bar is hidden by the bar itself, but that's for another bug report: #1968