Fix Travis build config

[liry]

https://docs.travis-ci.com/user/reference/trusty/ says:
Container-based infrastructure is currently being deprecated. Please
remove any sudo: false keys in your .travis.yml file to use the
default fully-virtualized Linux infrastructure instead.

Default env. is now Xenial which has only openjdk8 preinstalled.
See https://docs.travis-ci.com/user/trusty-to-xenial-migration-guide/.

[liry]

Hi @ericbottard,

since you're the last one who merged any PR into this project 16 months ago, could you please share some info, what's the future of this project?

Whether at least some patches would ever be merged and released (at least 2.0.x branch)? Or whether the project can be at least somehow passed to the community? When I check PRs, there seems to be bunch of people interested.

Thank you and I hope for your answer.

[liry]

Hi @joshlong,

since Eric is not answering and you've also contributed to this project, you may have some information about future of this project (see my previous comment).

Thank you.

[jvalkeal]

We've removed travis from this repo.

[liry]

@jvalkeal And do you have any information about future of this project? Whether at least some patches would ever be merged and released (at least 2.0.x branch)? Or whether the project can be at least somehow passed to the community? When I check PRs, there seems to be bunch of people interested.