[bisq-network/bisq] Bump gradle to v6.8.3, mockito to v3.9.0 (#5403)

[Maxim Belkin]

The oldest Mockito that lets me build Bisq (with Gradle 6.8.3) is 3.2.0.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/bisq-network/bisq/pull/5403#issuecomment-817212348
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bisq.network/pipermail/bisq-github/attachments/20210410/c345c420/attachment.htm>