TASK: Declare compatibility with Neos 8.x

Author: mficzel

composer.json

@@ -4,7 +4,7 @@
     "name": "flowpack/fullpagecache",
     "license": "MIT",
     "require": {
-        "neos/neos": "^7.0 || dev-master",
+        "neos/neos": "^7.0 || ^8.0 || dev-master",
         "guzzlehttp/psr7": "~1.4"
     },
     "autoload": {