Bump minimum required Symfony version to 4.4, 5.3, 6.0

Author: ruudk

composer.json

@@ -10,18 +10,18 @@
     "require": {
         "php":                          "^7.4|^8.0",
 
-        "symfony/dependency-injection": "^4.3|^5.0|^6.0",
-        "symfony/event-dispatcher":     "^4.3|^5.0|^6.0",
-        "symfony/config":               "^4.3|^5.0|^6.0",
-        "symfony/yaml":                 "^4.3|^5.0|^6.0",
-        "symfony/console":              "^4.3|^5.0|^6.0",
+        "symfony/dependency-injection": "^4.4|^5.3|^6.0",
+        "symfony/event-dispatcher":     "^4.4|^5.3|^6.0",
+        "symfony/config":               "^4.4|^5.3|^6.0",
+        "symfony/yaml":                 "^4.4|^5.3|^6.0",
+        "symfony/console":              "^4.4|^5.3|^6.0",
         "php-amqplib/php-amqplib":      "^2.12.2|^3.0",
         "psr/log":                      "^1.0 || ^2.0 || ^3.0",
-        "symfony/http-kernel":          "^4.4|^5.0|^6.0",
-        "symfony/framework-bundle":     "^4.4|^5.0|^6.0"
+        "symfony/http-kernel":          "^4.4|^5.3|^6.0",
+        "symfony/framework-bundle":     "^4.4|^5.3|^6.0"
     },
     "require-dev": {
-        "symfony/serializer":           "^4.3|^5.0|^6.0",
+        "symfony/serializer":           "^4.4|^5.3|^6.0",
         "phpunit/phpunit":              "^7.5|^8.5",
         "phpstan/phpstan":              "^0.12.11",
         "phpstan/phpstan-phpunit":      "^0.12.6"