Update pytest from 3.10.1 to 4.0.0 (#9994)
Update pytest from 3.10.1 to 4.0.0 (#9994)


kumar303/addons-server,mozilla/olympia,kumar303/olympia,mozilla/addons-server,mozilla/addons-server,bqbn/addons-server,diox/olympia,psiinon/addons-server,psiinon/addons-server,eviljeff/olympia,kumar303/olympia,wagnerand/olympia,bqbn/addons-server,eviljeff/olympia,bqbn/addons-server,mozilla/olympia,wagnerand/olympia,eviljeff/olympia,kumar303/addons-server,diox/olympia,wagnerand/addons-server,kumar303/addons-server,kumar303/olympia,mozilla/olympia,wagnerand/addons-server,psiinon/addons-server,psiinon/addons-server,bqbn/addons-server,aviarypl/mozilla-l10n-addons-server,wagnerand/olympia,mozilla/olympia,eviljeff/olympia,kumar303/olympia,aviarypl/mozilla-l10n-addons-server,kumar303/addons-server,aviarypl/mozilla-l10n-addons-server,mozilla/addons-server,wagnerand/olympia,diox/olympia,diox/olympia,mozilla/addons-server,wagnerand/addons-server,aviarypl/mozilla-l10n-addons-server,wagnerand/addons-server