Merge pull request #5 from takrout/master

Replace array_merge with array_merge_recursive in Stream class in order to for example add proxy to http options

src/Ripcord/Client/Transport/Stream.php

@@ -45,7 +45,7 @@ public function __construct($contextOptions = null)
      */
     public function post($url, $request)
     {
-        $options = array_merge(
+        $options = array_merge_recursive(
             $this->options,
             [
                 'http' => [