Test against PHP7

Author: wouterj

.travis.yml

@@ -6,6 +6,7 @@ php:
   - 5.5
   - 5.6
   - hhvm
+  - nightly
 
 sudo: false
 
@@ -31,6 +32,7 @@ matrix:
       env: SYMFONY_VERSION=2.7.*
     - php: 5.6
       env: SYMFONY_VERSION=3.0.*
+    - php: nightly
 
 before_script:
   - composer self-update