Update attrs to 21.3.0 - #387

Update attrs to 21.3.0#387

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masterjoaogarciadelima/libpythonpro:masterfrom

pyup-update-attrs-19.3.0-to-21.3.0joaogarciadelima/libpythonpro:pyup-update-attrs-19.3.0-to-21.3.0Copy head branch name to clipboard