Update pillow to 7.1.1#418

pyup-bot wants to merge 1 commit intomasterFordyceLab/AcqPack:masterfrom

pyup-update-pillow-4.2.1-to-7.1.1FordyceLab/AcqPack:pyup-update-pillow-4.2.1-to-7.1.1Copy head branch name to clipboard