* 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
* Add custom license header style in order to comply with Google's Checkstyle format
* Update license headers to comply with Google's Checkstyle format
* "visitor" pattern: Use local variable type inference
Update "visitor" pattern with local variable type inference.
* "value-object" pattern: Use local variable type inference
Update "value-object" pattern with local variable type inference.
* "unit-of-work" pattern: Use local variable type inference
Update "value-object" pattern with local variable type inference.
* "typeobjectpattern" pattern: Use local variable type inference
Update "value-object" pattern with local variable type inference.