Bump pillow from 5.3.0 to 6.2.0#2

dependabot[bot] wants to merge 8 commits into

mastermahjong-app/sample-web-app:masterfrom

dependabot/pip/pillow-6.2.0mahjong-app/sample-web-app:dependabot/pip/pillow-6.2.0Copy head branch name to clipboard