Update composer.json

Author: limingxinleo

composer.json

@@ -13,7 +13,7 @@
     "license": "Apache-2.0",
     "require": {
         "php": ">=7.2",
-        "ext-swoole": ">=4.2",
+        "ext-swoole": ">=4.4",
         "hyperf/cache": "~1.1.0",
         "hyperf/command": "~1.1.0",
         "hyperf/config": "~1.1.0",