Bump pillow from 5.3.0 to 6.2.0 in /Challenges/challenge_12_the_start_of_something_big/GregHilston#63

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dependabot/pip/Challenges/challenge_12_the_start_of_something_big/GregHilston/pillow-6.2.0GregHilston/Code-Foo:dependabot/pip/Challenges/challenge_12_the_start_of_something_big/GregHilston/pillow-6.2.0Copy head branch name to clipboard