allow contao 5

Author: denniserdmann

composer.json

@@ -18,7 +18,7 @@
     "source":"https://github.com/nutshell-framework/core-bundle"
   },
   "require": {
-    "contao/core-bundle": "^4.9"
+    "contao/core-bundle": "^4.9 || ^5.2"
   },
   "autoload":{
     "psr-4": {
@@ -28,4 +28,4 @@
   "extra": {
     "contao-manager-plugin": "Nutshell\\Framework\\ContaoManager\\Plugin"
   }
-}
+}