Set dependency to the Neos 2.x version

Author: Bastian Waidelich

composer.json

@@ -4,7 +4,7 @@
     "description": "Neos plugin demonstrating a simple frontend login",
     "license": "MIT",
     "require": {
-        "typo3/neos": "*"
+        "typo3/neos": "~2.0"
     },
     "autoload": {
         "psr-0": {