Test macros 2.13x3 cross compilation

[MateuszKubuszok]

TODO:

• [x] update build
  • [ ] test locally that artifacts are not broken
• [x] define 2.13 and 3 test cases
  • [x] case classes
  • [x] case classes with @BeanProperty
  • [x] classes with default values in constructor
  • [x] enums with parameters in any value
  • [x] enums without parameters in any value
  • [x] sealed traits
• [ ] tests 2.13 converting 3 classes and vice versa
  • [ ] case classes
  • [ ] @BeanProperties as source/target
  • [ ] sealed traits to/from enums
  • [ ] default values in target type
• [ ] documentation - describe what is possible and what isn't