add oxid metapackage as requirement

composer.json

@@ -1,7 +1,10 @@
 {
   "name": "d3/oxid-klarna-replacement",
-  "description": "empty replacement for Klarna module, when it's not used",
+  "description": "Empty replacement for the Klarna module if it is not used and should be removed from the installation.",
   "version": "1.0.0",
+  "require": {
+    "oxid-esales/oxideshop-metapackage-ce": "^6.0"
+  },
   "replace": {
     "topconcepts/oxid-klarna-6": "*"
   }