Enonic React Components v6.0.0-RC1

Bump @enonic-types/lib-content from 7.15.2 to 7.15.3

Bumps [@enonic-types/lib-content](https://github.com/enonic/xp) from 7.15.2 to 7.15.3.
- [Release notes](https://github.com/enonic/xp/releases)
- [Commits](https://github.com/enonic/xp/compare/v7.15.2...v7.15.3)

---
updated-dependencies:
- dependency-name: "@enonic-types/lib-content"
  dependency-version: 7.15.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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