Add hhvm to the travis build.

Spencer Rinehart · Spencer Rinehart · commit c6047d8815ab · 2014-05-21T21:35:03.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,5 +4,6 @@ php:
   - 5.5
   - 5.4
   - 5.3
+  - hhvm
 install: composer install
 script: ./vendor/bin/phpunit --strict tests
