update require composer

Author: JanHuang

composer.json

@@ -14,7 +14,7 @@
         "php": ">=5.6",
         "ext-swoole": ">=1.8",
         "fastd/packet": "~1.3.0",
-        "fastd/http": "3.0.x-dev",
+        "fastd/http": "~3.0.0",
         "symfony/console": "^3.0"
     },
     "require-dev": {