Bump ransack from 1.8.6 to 1.8.7
Bump ransack from 1.8.6 to 1.8.7

Bumps [ransack](https://github.com/activerecord-hackery/ransack) from 1.8.6 to 1.8.7.
- [Release notes](https://github.com/activerecord-hackery/ransack/releases/tag/1.8.7)
- [Changelog](https://github.com/activerecord-hackery/ransack/blob/master/CHANGELOG.md)
- [Commits](https://github.com/activerecord-hackery/ransack/compare/v1.8.6...v1.8.7)
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