Add PHP 5.6 and 7.0 to test matrix

Author: danmichaelo

.travis.yml

@@ -4,6 +4,8 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - 7.0
 
 before_script: 
  - echo 'date.timezone = "UTC"' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini