Bug#933264: gradle: update SID version to new version?

[殷啟聰 | Kai-Chung Yan]

Newer version of Gradle requires Kotlin, which is being worked on right now. See https://java-team.pages.debian.net/gsoc-kotlin-blog

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://alioth-lists.debian.net/pipermail/pkg-java-maintainers/attachments/20190729/bf24bab2/attachment.sig>