Merge pull request #24 from symfony-util/5.3

Update .travis.yml

Author: Nardberjean

.travis.yml

@@ -26,7 +26,7 @@ matrix:
   - php: 7.0
     env:
     - SYMFONY_LTS="2"
-    - PHPUNIT=phpunit-5.7
+    - PHPUNIT=phpunit-4.8
     - TEST_LINT=`true`
     - PHP_CS_FIXER=`true`
     - SENSIO_SECURITY=`true`