Start officially supporting PHP 7

Author: wouterj

.travis.yml

@@ -19,16 +19,15 @@ env:
 
 matrix:
   include:
+    - php: 5.3
+      env: SYMFONY_VERSION=2.3.* COMPOSER_FLAGS="--prefer-lowest"
     - php: 5.6
       env: SYMFONY_VERSION=2.3.*
     - php: 5.6
       env: SYMFONY_VERSION=2.8.*
     - php: 5.6
       env: SYMFONY_VERSION=3.0.*
-    - php: 5.3
-      env: SYMFONY_VERSION=2.3.* COMPOSER_FLAGS="--prefer-lowest"
   allow_failures:
-    - php: 7.0
     - env: SYMFONY_VERSION=2.8.*
     - env: SYMFONY_VERSION=3.0.*
   finish_fast: true