Bump mini_magick from 4.7.0 to 4.7.1
Bump mini_magick from 4.7.0 to 4.7.1

Bumps [mini_magick](https://github.com/minimagick/minimagick) from 4.7.0 to 4.7.1.
- [Release notes](https://github.com/minimagick/minimagick/releases/tag/v4.7.1)
- [Changelog](https://github.com/minimagick/minimagick/blob/master/CHANGELOG.md)
- [Commits](https://github.com/minimagick/minimagick/compare/v4.7.0...v4.7.1)
theodi/member-directory,theodi/member-directory,theodi/member-directory