Add support of HHVM for Travis

Progi1984 · Progi1984 · commit db4537dc2888 · 2013-12-16T18:54:12.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,7 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - hhvm
 
 before_script:
   ## Composer
