Bump pillow from 5.4.1 to 6.2.0 in /mysite Bumps [pillow](https://github.com/python-pillow/Pillow) from 5.4.1 to 6.2.0. - [Release notes](https://github.com/python-pillow/Pillow/releases) - [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst) - [Commits](https://github.com/python-pillow/Pillow/compare/5.4.1...6.2.0) Signed-off-by: dependabot[bot]