Reduce output about depencencies

[RaySinnema]

I see this on every Gradle run:

Adding MapStruct dependencies
- org.mapstruct:mapstruct:1.6.3
- org.mapstruct:mapstruct-processor:1.6.3
Adding Lombok dependencies
- org.projectlombok:lombok-mapstruct-binding:0.2.0
Adding Spring dependencies
- org.mapstruct.extensions.spring:mapstruct-spring-extensions:2.0.0
- org.mapstruct.extensions.spring:mapstruct-spring-annotations:2.0.0
- org.mapstruct.extensions.spring:mapstruct-spring-test-extensions:2.0.0

This is not useful and should not be logged at lifecycle level, but rather at info.
See #34

[AkaZver]

Hello!
Yes, I agree :)
PR was merged, see your changes in the new release 2.0.6