Fix composer

Author: zonky2

composer.json

@@ -9,31 +9,31 @@
     "content element"
   ],
   "type": "contao-bundle",
-  "homepage": "http://now.metamodel.me/",
+  "homepage": "https://now.metamodel.me/",
   "license": "LGPL-3.0-or-later",
   "authors": [
     {
       "name": "Andreas Dziemba",
       "email": "dziemba@men-at-work.de",
-      "homepage": "http://www.men-at-work.de/",
+      "homepage": "https://www.men-at-work.de/",
       "role": "Developer"
     }
   ],
   "support": {
     "email": "mail@metamodel.me",
     "issues": "https://github.com/MetaModels/attribute_contentarticle/issues",
-    "wiki": "http://de.contaowiki.org/MetaModels",
+    "wiki": "https://de.contaowiki.org/MetaModels",
     "irc": "irc://irc.freenode.org/contao.mm",
     "source": "https://github.com/MetaModels/attribute_contentarticle"
   },
   "require": {
-    "php": "^7.2",
-    "contao-community-alliance/dc-general": "^2.1.3",
+    "php": "^7.4",
+    "ext-pdo": "*",
+    "contao-community-alliance/dc-general": "^2.2",
     "contao/core-bundle": "^4.9.0, <4.13.0",
     "metamodels/core": "^2.2",
-    "symfony/dependency-injection": "^3.4.26 || ^4.2.7",
-    "symfony/http-kernel": "^3.4.26 || ^4.2.7",
-    "ext-pdo": "*"
+    "symfony/dependency-injection": "^4.4.6",
+    "symfony/http-kernel": "~4.4.13"
   },
   "require-dev": {
     "contao/manager-plugin": "^2.1",