updated vendors for 2.0.17

vendors.php

@@ -36,8 +36,8 @@ $deps = array(
     array('doctrine-dbal', 'http://github.com/doctrine/dbal.git', '2.1.7'),
     array('doctrine-common', 'http://github.com/doctrine/common.git', '2.1.4'),
     array('monolog', 'http://github.com/Seldaek/monolog.git', '1.0.2'),
-    array('swiftmailer', 'http://github.com/swiftmailer/swiftmailer.git', 'v4.2.0'),
-    array('twig', 'http://github.com/fabpot/Twig.git', 'v1.8.3'),
+    array('swiftmailer', 'http://github.com/swiftmailer/swiftmailer.git', 'v4.2.1'),
+    array('twig', 'http://github.com/fabpot/Twig.git', 'v1.9.2'),
 );
 
 foreach ($deps as $dep) {