add missing php and ioncube dependencies

composer.json

@@ -33,6 +33,8 @@
     }
   },
   "require": {
+    "php": "5.6 - 7.0",
+    "ext-ioncube-loader": "*",
     "oxid-esales/oxideshop-ce": "6.0 - 6.3",
     "d3/modcfg": "^5.1.2.0",
     "cweagans/composer-patches": "~1.6.0"