Update react/dns to use v1 or v0

Author: Nenad Stojanovikj

composer.json

@@ -14,7 +14,7 @@
         "php": "^5.5 || ^7.0",
         "php-http/httplug": "^1.0",
         "react/http-client": "^0.4.8 || ^0.5",
-        "react/dns": "^0.4.1",
+        "react/dns": "^1.0|^0.4",
         "react/socket": "^0.8",
         "php-http/discovery": "^1.0"
     },