Given GitHub has introduced its own CI, i.e., GitHub Actions, would you consider migrating from Travis CI to that? In its current form, setup-java[1] doesn't support multiple JDKs, but I think it can be worked around. If the rest of the people would agree, I will create a ticket for that and work on it after "replacing JsonLayout with LogstashLayout" task, which I am currently busy right now.
Advantages? Technically none, socially a more GitHub-friendly project setup. [1] https://github.com/actions/setup-java/
