Add Symfony 5 support

Author: Patrick Mota

composer.json

@@ -20,7 +20,7 @@
         "ext-dom": "*",
         "monolog/monolog": "~1.7",
         "phpunit/php-file-iterator": "~2.0",
-        "symfony/console": "~2.1|~3.0|~4.0"
+        "symfony/console": "~2.1|~3.0|~4.0|~5.0"
     },
     "require-dev": {
         "kherge/box": "~2.7",