What's Changed
* save and load callbacks in tests by Dan1lD in https://github.com/salute-developers/smart_app_framework/pull/175
* DPNLPF-1862: Add JSON schema validator by bart0003 in https://github.com/salute-developers/smart_app_framework/pull/158
**Full Changelog**: https://github.com/salute-developers/smart_app_framework/compare/v3.0.0rc12...v3.0.0rc13