switch to dist trusty for hhvm

tflori · tflori · commit b33708bb15e9 · 2017-07-03T07:05:59.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,5 @@
 language: php
+dist: trusty
 php:
   - 7.0
   - 5.6
