- remove junit4 dependecies
- refactor the unit tests by junit5
- enhance the spring-statemachine-test and spring-statemachine-build-tests so they can work together with junit4/junit5
- relates #779
- Align related spring train deps
- Modify some other deps to get correct versions
- Some testing changes as boot 1.4.1 shuffled some
test stuff around.
- Fixed deprecations with newer boot and framework
- Fixes#256