* Features
- Support YAML configuration file
* Yaml validation default value
- Added heartbeat parameter
* Fixes
- Returning only REGISTERED NFs from Search result
- Removing suspended NFs after timeout
* Tech debt
- Updated common models to 3GPP TS 29.571 Release 16.13.0 and moved them to the shared common submodule
- Switching to clang-format-12
- Published image on Docker-Hub is using now Ubuntu-22 as base image
* Ubuntu-18 is no longer supported