Update composer

composer.json

@@ -14,23 +14,23 @@
         }
     ],
     "require": {
-        "php": "^7.1",
+        "php": "^7.2",
         "sonata-project/admin-bundle": "^3.1",
         "sonata-project/classification-bundle": "^3.0",
         "sonata-project/doctrine-extensions": "^1.6",
         "sonata-project/doctrine-orm-admin-bundle": "^3.0",
         "sonata-project/media-bundle": "^3.0",
-        "symfony/config": "^3.4 || ^4.0",
-        "symfony/dependency-injection": "^3.4 || ^4.0",
-        "symfony/form": "^3.4 || ^4.0",
-        "symfony/http-foundation": "^3.4 || ^4.0",
-        "symfony/options-resolver": "^3.4 || ^4.0",
-        "symfony/routing": "^3.4 || ^4.0",
-        "symfony/security-core": "^3.4 || ^4.0",
-        "symfony/templating": "^3.4 || ^4.0",
-        "symfony/translation": "^3.4 || ^4.0",
-        "symfony/twig-bridge": "^3.4 || ^4.0",
-        "symfony/validator": "^3.4 || ^4.0",
+        "symfony/config": "^4.4",
+        "symfony/dependency-injection": "^4.4",
+        "symfony/form": "^4.4",
+        "symfony/http-foundation": "^4.4",
+        "symfony/options-resolver": "^4.4",
+        "symfony/routing": "^4.4",
+        "symfony/security-core": "^4.4",
+        "symfony/templating": "^4.4",
+        "symfony/translation": "^4.4",
+        "symfony/twig-bridge": "^4.4",
+        "symfony/validator": "^4.4",
         "twig/extensions": "^1.0",
         "twig/twig": "^2.0"
     },
@@ -41,7 +41,7 @@
         "matthiasnoback/symfony-config-test": "^4.0",
         "matthiasnoback/symfony-dependency-injection-test": "^4.0",
         "sonata-project/block-bundle": "^3.18.3",
-        "symfony/phpunit-bridge": "^5.0"
+        "symfony/phpunit-bridge": "^5.1"
     },
     "config": {
         "sort-packages": true