Update attrs to 26.1.0#426

pyup-bot wants to merge 1 commit intomasterlimberger/libpythonpro:masterfrom

pyup-update-attrs-20.3.0-to-26.1.0limberger/libpythonpro:pyup-update-attrs-20.3.0-to-26.1.0Copy head branch name to clipboard