Drop support for Symfony 4.4 and earlier, and 5.0-5.2

Author: mbabker

composer.json

@@ -14,7 +14,7 @@
     ],
     "require": {
         "php": "^7.1 || ^8.0",
-        "symfony/config": "^2.7 || ^3.4 || ^4.0 || ^5.0"
+        "symfony/config": "^4.4 || ^5.3"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0"