Bump schema from 0.7.5 to 0.7.7

Bumps [schema](https://github.com/keleshev/schema) from 0.7.5 to 0.7.7.
- [Release notes](https://github.com/keleshev/schema/releases)
- [Changelog](https://github.com/keleshev/schema/blob/master/CHANGELOG.md)
- [Commits](keleshev/schema@v0.7.5...v0.7.7)

---
updated-dependencies:
- dependency-name: schema
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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