Update tox to 4.18.0#379

pyup-bot wants to merge 1 commit intomasterBenjaminDavison/aws_data_toolkit:masterfrom

pyup-update-tox-3.14.6-to-4.18.0BenjaminDavison/aws_data_toolkit:pyup-update-tox-3.14.6-to-4.18.0Copy head branch name to clipboard