add php 7 in travis

Emmanuel ROECKER · Emmanuel ROECKER · commit 09cb067517c6 · 2016-09-05T15:50:16.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,8 @@
 language: php
 php:
-  - '5.4'
   - '5.5'
   - '5.6'
+  - '7.0'
 install:
   - composer install
 script:
