Update pluggy to 1.4.0#249

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

pyup-update-pluggy-0.13.1-to-1.4.0limberger/libpythonpro:pyup-update-pluggy-0.13.1-to-1.4.0Copy head branch name to clipboard