Chore(deps): Bump justinrainbow/json-schema from 5.3.0 to 6.0.0

Bumps [justinrainbow/json-schema](https://github.com/jsonrainbow/json-schema) from 5.3.0 to 6.0.0.
- [Release notes](https://github.com/jsonrainbow/json-schema/releases)
- [Changelog](https://github.com/jsonrainbow/json-schema/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jsonrainbow/json-schema/compare/5.3.0...6.0.0)

---
updated-dependencies:
- dependency-name: justinrainbow/json-schema
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -9,7 +9,7 @@
 		}
 	],
 	"require": {
-		"justinrainbow/json-schema": "^5.2"
+		"justinrainbow/json-schema": "^6.0"
 	},
 	"require-dev": {
 		"roave/security-advisories": "dev-master",