Update pillow to 6.2.0#341

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

pyup-update-pillow-4.2.1-to-6.2.0FordyceLab/AcqPack:pyup-update-pillow-4.2.1-to-6.2.0Copy head branch name to clipboard