* remove spring dep
move junit, logging, mockito under dep mgmt
* upgrade anti-corruption-layer deps
* async method invocation
* balking, bloc
* bridge to bytecode
* caching
* callback - cqrs
* component - health check
* hexagonal - metadata mapping
* rest of the patterns
* remove checkstyle, take spotless into use
* refactor: move tests of leader-followers into correct package
* dep: remove version constraint for Mockito in acyclic-visitor
* dep: remove version constraint for Mockito in caching
* chore: cleanup mockito-core import on some POMs
* dep: upgrade core.mocktio 3.5.6 to 4.5.1
"- org.mockito.Mockito#verifyZeroInteractions an alias of verifyNoMoreInteractions"
https://github.com/mockito/mockito/commit/caf35b24e2764df0498469526ecb3e7ec68a0430
* Add custom license header style in order to comply with Google's Checkstyle format
* Update license headers to comply with Google's Checkstyle format