- Focus of this commit is to have modern gradle build.
- Migrate most of a plugin configurations from dsl
into buildSrc.
- This fixes issues with existing docs build.
- Allows to sign files so that we have that part
done for central in a build.
- We can skip publishing samples.
- We're able to share similar logic for modules
which are meant for publish or just being samples.
- It's easier to upgrade gradle versions without
getting various build issues.
- Relates #1143
- 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
