Require react/http-client to be ~0.5.0

Author: Nenad Stojanovikj

composer.json

@@ -13,7 +13,7 @@
     "require": {
         "php": "^5.5 || ^7.0",
         "php-http/httplug": "^1.0",
-        "react/http-client": "^0.4.8 || ^0.5",
+        "react/http-client": "~0.5.0",
         "react/dns": "^0.4.1",
         "react/socket": "^0.8",
         "php-http/discovery": "^1.0"