Bump sails from 1.5.6 to 1.5.7

Bumps [sails](https://github.com/balderdashy/sails) from 1.5.6 to 1.5.7.
- [Release notes](https://github.com/balderdashy/sails/releases)
- [Changelog](https://github.com/balderdashy/sails/blob/master/CHANGELOG.md)
- [Commits](balderdashy/sails@v1.5.6...v1.5.7)

---
updated-dependencies:
- dependency-name: sails
  dependency-type: direct:development
...

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