v1.2.0

Add

• Configurable default values
  • default context key
  • default scheduler

Rename

• io.numichi.reactive.logger.java to io.numichi.reactive.logger.reactor
  In reactor package is not necessarily java specific, but can also be used in kotlin if a reactor API is used.

• io.numichi.reactive.logger.kotlin to io.numichi.reactive.logger.coroutine
  For a similar reason, they can be used under kotlin coroutine.