Hi,

this PR upgrades to Groovy 2.5.10. I know this sort of upgrade is usually handled via bomr, but this is relevant for the JDK 14 setup which I'm currently working on.

In a separate PR I'd eventually use the new BOM if that's okay for you.

Cheers, Christoph

Comment From: snicoll

Thanks Christoph. Using the BOM sounds good to me.

Comment From: snicoll

FTR, while we don't accept PRs for simple dependency upgrades like this one, I've decided to merge it as it is a prerequisite for another PR (#20413).