Update s3transfer to 0.4.2#717

pyup-bot wants to merge 1 commit intomasterherbetyp/pythonprodjango:masterfrom

pyup-update-s3transfer-0.3.3-to-0.4.2herbetyp/pythonprodjango:pyup-update-s3transfer-0.3.3-to-0.4.2Copy head branch name to clipboard