Update virtualenv to 20.31.0#480

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

pyup-update-virtualenv-20.24.2-to-20.31.0renatodamas/libpythonpro:pyup-update-virtualenv-20.24.2-to-20.31.0Copy head branch name to clipboard