resolve #1 issue

Author: ddrv

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "ddrv/mailer",
-    "version":"3.1.1",
+    "version":"3.1.2",
     "require":{
         "php":">=5.3.0",
         "ext-mbstring": "*"

src/Mailer.php

@@ -10,7 +10,7 @@
 final class Mailer
 {
 
-    const MAILER_VERSION = "3.1.1";
+    const MAILER_VERSION = "3.1.2";
 
     const CHANNEL_DEFAULT = "default";
     const CHANNEL_ALL     = "*";

src/Transport/Fake.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Message;
 
 final class Fake implements TransportInterface
@@ -27,7 +28,7 @@ public function getSender()
         return "";
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/File.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Message;
 
 final class File implements TransportInterface
@@ -58,7 +59,7 @@ public function getSender()
         return $this->sender;
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/Sendmail.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Message;
 
 final class Sendmail implements TransportInterface
@@ -46,7 +47,7 @@ public function getSender()
         return $this->sender;
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/Smtp.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Message;
 
 final class Smtp implements TransportInterface
@@ -106,7 +107,7 @@ public function __destruct()
         fclose($this->socket);
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/TransportInterface.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Message;
 
 interface TransportInterface
@@ -22,9 +23,9 @@ public function send(Message $message, $recipients);
     public function getSender();
 
     /**
-     * @param callable $logger
+     * @param Closure $logger
      * @return void
      */
-    public function setLogger(callable $logger);
+    public function setLogger(Closure $logger);
 }