Test with more Symfony versions

Author: matthiasnoback

.travis.yml

@@ -12,15 +12,14 @@ matrix:
     - php: hhvm
 
 env:
-  - SYMFONY_VERSION=2.5.* PHPUNIT_VERSION=~3.7
+  - SYMFONY_VERSION=2.6.* PHPUNIT_VERSION=~3.7
   - SYMFONY_VERSION=2.0.* PHPUNIT_VERSION=~4.0
   - SYMFONY_VERSION=2.1.* PHPUNIT_VERSION=~4.0
   - SYMFONY_VERSION=2.2.* PHPUNIT_VERSION=~4.0
   - SYMFONY_VERSION=2.3.* PHPUNIT_VERSION=~4.0
   - SYMFONY_VERSION=2.4.* PHPUNIT_VERSION=~4.0
   - SYMFONY_VERSION=2.5.* PHPUNIT_VERSION=~4.0
-  - SYMFONY_VERSION=2.5.* PHPUNIT_VERSION=~4.2
-  - SYMFONY_VERSION=2.5.* PHPUNIT_VERSION=~4.3
+  - SYMFONY_VERSION=2.6.* PHPUNIT_VERSION=~4.0
 
 before_script:
   - composer require --no-update "symfony/config:${SYMFONY_VERSION}"