add 9.0 support

Author: setharell

composer.json

@@ -13,7 +13,7 @@
     "ext-json": "*",
     "php": "^7.2|^8.0",
     "box/spout": "^3.2",
-    "illuminate/support": "^5.5|^6.0|^7.0|^8.0"
+    "illuminate/support": "^5.5|^6.0|^7.0|^8.0|^9.0"
   },
   "require-dev": {
     "phpunit/phpunit": "~6.0|^7.0|^8.0|^9.0",