Update composer.json

Author: samzzi

composer.json

@@ -3,16 +3,10 @@
     "description": "Facebook SDK for PHP",
     "keywords": ["facebook", "sdk"],
     "type": "library",
-    "homepage": "https://github.com/facebook/php-graph-sdk",
+    "homepage": "https://github.com/genxbe/php-graph-sdk",
     "license": "Facebook Platform",
-    "authors": [
-        {
-            "name": "Facebook",
-            "homepage": "https://github.com/facebook/php-graph-sdk/contributors"
-        }
-    ],
     "require": {
-        "php": "^5.4|^7.0|^8.0"
+        "php": ">=8.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.0",