Gradle Plugin: support Gradle 7.0

The Gnag Plugin does not work with Gradle 7.0, see logs:

FAILURE: Build failed with an exception.

* What went wrong:
A problem was found with the configuration of task ':app:gnagCheck' (type 'GnagCheckTask').
  - Type 'com.btkelly.gnag.tasks.GnagCheckTask' property 'logger' is missing an input or output annotation.
    
    Reason: A property without annotation isn't considered during up-to-date checking.
    
    Possible solutions:
      1. Add an input or output annotation.
      2. Mark it as @Internal.
    
    Please refer to https://docs.gradle.org/7.0.2/userguide/validation_problems.html#missing_annotation for more details about this problem

[btkelly]

Thanks @nailshaykhraziev ! I’ll be working on updating Gang with Gradle 7 support as well as moving it off of Jcenter. I’ll post here once a new version with the issues resolved is available.

[btkelly]

@nailshaykhraziev Gradle 7 support has been released, version 7.1.1 is actually the new minimum. If you wanted to give version 3.0.2 a try you should be all set. If you have any issues still please let me know. This was a major version change and you can check out the major changes in the release notes for version 3.0.0. I would recommend using 3.0.2 though as I fixed / updated a few issues as well as bumping down the JDK requirement to 11 instead of 12.