Support elasticsearch 9.x

Author: jopplt

composer.json

@@ -38,7 +38,7 @@
     },
     "require": {
         "php": "^8.2",
-        "elasticsearch/elasticsearch": "^8.0"
+        "elasticsearch/elasticsearch": "^8.0 || ^9.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^11.0",