Update tox to 4.15.0#527

pyup-bot wants to merge 1 commit intomastermatt2000/json_stream_reader:masterfrom

pyup-update-tox-3.8.6-to-4.15.0matt2000/json_stream_reader:pyup-update-tox-3.8.6-to-4.15.0Copy head branch name to clipboard