[SwiftmailerBridge] allowed versions 4.2.*

src/Symfony/Bridge/Swiftmailer/composer.json

@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "swiftmailer/swiftmailer": ">=4.1.2,<4.2-dev"
+        "swiftmailer/swiftmailer": ">=4.1.2,<4.3-dev"
     },
     "suggest": {
         "symfony/http-kernel": "self.version"