Added support for the "retry" field.

Author: boenrobot

src/EventSource.php

@@ -195,6 +195,10 @@ private function request()
                         $this->lastEventId = $message->lastEventId;
                     }
 
+                    if ($message->retry !== null) {
+                        $this->reconnectTime = $message->retry / 1000;
+                    }
+
                     if ($message->data !== '') {
                         $this->emit($message->type, array($message));
                         if ($this->readyState === self::CLOSED) {

src/MessageEvent.php

@@ -29,6 +29,8 @@ public static function parse($data)
                 $message->lastEventId .= $value;
             } elseif ($name === 'event') {
                 $message->type = $value;
+            } elseif ($name === 'retry') {
+                $message->retry = (int)$value;
             }
         }
 
@@ -53,4 +55,9 @@ public static function parse($data)
      * @var string
      */
     public $type = 'message';
+
+    /**
+     * @var ?int
+     */
+    public $retry;
 }