Update composer.json

Author: savamarkovic

composer.json

@@ -35,7 +35,7 @@
     "bin": ["bin/generate_schema_objects"],
     "require": {
         "php": "^7.1 || ^8.0",
-        "gmostafa/php-graphql-client": "^1.6 || dev-master"
+        "gmostafa/php-graphql-client": "^1.6 || ^1.9"
     },
     "scripts": {
         "test": "phpunit tests/ --whitelist src/ --coverage-clover build/coverage/xml"