Bumps [strong_migrations](https://github.com/ankane/strong_migrations) from 0.5.1 to 0.6.2. - [Release notes](https://github.com/ankane/strong_migrations/releases) - [Changelog](https://github.com/ankane/strong_migrations/blob/master/CHANGELOG.md) - [Commits](https://github.com/ankane/strong_migrations/compare/v0.5.1...v0.6.2) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>master