Merge pull request #187 from emulienfou/master

Missing package `symfony/config` update to SF5

Author: dunglas

composer.json

@@ -25,7 +25,7 @@
         "friendsofphp/php-cs-fixer": "^2.15",
         "league/html-to-markdown": "^4.0",
         "psr/log": "^1.0",
-        "symfony/config": "^3.3 || ^4.0",
+        "symfony/config": "^3.3 || ^4.0 || ^5.0",
         "symfony/console": "^2.7 || ^3.0 || ^4.0 || ^5.0",
         "symfony/yaml": "^2.7 || ^3.0 || ^4.0 || ^5.0",
         "twig/twig": "^1.35 || ^2.0 || ^3.0"