Update virtualenv to 20.4.2#1464

pyup-bot wants to merge 1 commit intomasterkragniz/python-etcd3:masterfrom

pyup-update-virtualenv-20.0.18-to-20.4.2kragniz/python-etcd3:pyup-update-virtualenv-20.0.18-to-20.4.2Copy head branch name to clipboard