Update requirements

Author: baumannsven

composer.json

@@ -32,7 +32,7 @@
     "source": "https://github.com/MetaModels/attribute_translatedfile"
   },
   "require": {
-    "php": "^5.4 | ^7.0",
+    "php": "^5.6 || ^7.0",
     "contao/core": "^3.5.5",
     "contao-community-alliance/composer-plugin": "~2.0",
     "contao-community-alliance/dc-general": "~2.0@beta",