Add mail quzzle options.

Signed-off-by: crynobone <crynobone@gmail.com>

src/TransportManager.php

@@ -1,15 +1,16 @@
 <?php namespace Orchestra\Notifier;
 
 use Aws\Ses\SesClient;
+use Illuminate\Support\Arr;
 use Illuminate\Support\Manager;
 use GuzzleHttp\Client as HttpClient;
 use Orchestra\Memory\ContainerTrait;
+use Swift_MailTransport as MailTransport;
+use Swift_SmtpTransport as SmtpTransport;
 use Illuminate\Mail\Transport\LogTransport;
 use Illuminate\Mail\Transport\SesTransport;
 use Illuminate\Mail\Transport\MailgunTransport;
 use Illuminate\Mail\Transport\MandrillTransport;
-use Swift_SmtpTransport as SmtpTransport;
-use Swift_MailTransport as MailTransport;
 use Swift_SendmailTransport as SendmailTransport;
 
 class TransportManager extends Manager
@@ -93,9 +94,10 @@ protected function createMailDriver()
      */
     protected function createMailgunDriver()
     {
-        $client = new HttpClient();
         $config = $this->getTransportConfig();
 
+        $client = new HttpClient(Arr::get($config, 'guzzle', []));
+
         return new MailgunTransport($client, $config['secret'], $config['domain']);
     }
 
@@ -106,9 +108,10 @@ protected function createMailgunDriver()
      */
     protected function createMandrillDriver()
     {
-        $client = new HttpClient();
         $config = $this->getTransportConfig();
 
+        $client = new HttpClient(Arr::get($config, 'guzzle', []));
+
         return new MandrillTransport($client, $config['secret']);
     }