Fixed broken build on HHVM

Nyholm · web-flow · commit 591d106ee1e5 · 2017-06-23T09:02:32.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,7 +5,12 @@ php:
     - 5.5
     - 5.6
     - 7.0
-    - hhvm
+    - 7.1
+
+matrix: 
+  include:
+    - php: hhvm
+      dist: trusty
 
 before_script:
     - travis_retry composer self-update
