fix README; clean stream

Author: maximerenou

README.md

@@ -59,7 +59,7 @@ $identifiers = $conversation->getIdentifiers();
 
 // ...
 // Resume conversation with $identifiers parameter
-$conversation = $ai->resumeChatConversation($identifiers);
+$conversation = $ai->resumeConversation($identifiers);
 ```
 
 </details> 

src/Conversation.php

@@ -114,11 +114,7 @@ public function ask(Prompt $message, $callback = null)
             CURLOPT_POSTFIELDS => json_encode($data)
         ]);
 
-        $es->onMessage(function (Event $event) use ($es, &$callback) {
-            if ($es === 4) {
-                $es->abort();
-            }
-
+        $es->onMessage(function (Event $event) use (&$callback) {
             $message = $this->handlePacket($event->data);
 
             if ($message === false)