Run matplotlylib tests in CI - #5794

Run matplotlylib tests in CI#5794

robertoffmoura wants to merge 5 commits into

plotly:mainplotly/plotly.py:mainfrom

robertoffmoura:rm/add-matplotlylib-tests-to-CIrobertoffmoura/plotly.py:rm/add-matplotlylib-tests-to-CICopy head branch name to clipboard