travis: group: deprecated-2017Q4 to keep using sudo and the "fast version" of the images.

it seems linux is timing out after the recent travisci changes.
2017-12-28 09:11:26 -08:00 · 2017-12-28 09:11:26 -08:00 · fed7da34e2
parent 9dbfc9351c
commit fed7da34e2
1 changed files with 1 additions and 0 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -11,6 +11,7 @@ branches:
    - master
 sudo: required
 dist: trusty
+group: deprecated-2017Q4
 services:
  - postgresql
  - redis-server