Gradle 7 support

[VitaliyKulikov]

• What went wrong:
  A problem was found with the configuration of task ':thinPom' (type 'PomTask').

  • Type 'PomTask' field 'output' without corresponding getter has been annotated with @OutputFile.

    Reason: Annotations on fields are only used if there's a corresponding getter for the field.

    Possible solutions:

    1. Add a getter for field 'output'.
    2. Remove the annotations on 'output'.

    Please refer to https://docs.gradle.org/7.0/userguide/validation_problems.html#ignored_annotations_on_field for more details about this problem.

[dsyer]

Did you try it and it worked?