Tests only with PHP 7

.travis.yml

@@ -1,19 +1,10 @@
 language: php
 
 php:
-  - 5.6
   - 7.0
   - 7.1
 
-env:
-  global:
-    - SYMFONY_VERSION="~3.2 < 3.3"
-
 script : phpunit --coverage-clover=coverage.clover && wget https://scrutinizer-ci.com/ocular.phar && php ocular.phar code-coverage:upload --format=php-clover coverage.clover
 
 before_script:
-  - composer require "symfony/framework-bundle:~3.2 < 3.3"
-  - composer require "symfony/validator:~3.2 < 3.3"
-  - composer require "symfony/finder:~3.2 < 3.3"
-  - composer require "symfony/browser-kit:~3.2 < 3.3"
-  - composer install --dev 
+  - composer install