Require the http-client as well to ensure we use a working version

Author: WyriHaximus

composer.json

@@ -16,6 +16,7 @@
     "clue/block-react": "^1.1",
     "ocramius/package-versions": "^1.1",
     "react/dns": "^0.4.9",
+    "react/http-client": "^0.4.17",
     "reactivex/rxphp": "^2.0",
     "rx/websocket": "^1.0",
     "voryx/event-loop": "^2.0.2"