Travis-CI: use "container-based infrastructure"
authorAlexander Barton <alex@barton.de>
Sun, 10 Jan 2016 18:50:00 +0000 (19:50 +0100)
committerAlexander Barton <alex@barton.de>
Sun, 10 Jan 2016 18:50:51 +0000 (19:50 +0100)
commit8f0d24c831dc5099278b9844a2ece346ccc06149
treea0dceba727643a5127de908432254805f5663469
parent0a6e28458296c8a7b72039d88b5754f3e8053b28
Travis-CI: use "container-based infrastructure"

See <https://docs.travis-ci.com/user/migrating-from-legacy/> for
details.
.travis.yml