updated VERSION for 4.2.6

Author: fabpot

src/Symfony/Component/HttpKernel/Kernel.php

@@ -73,12 +73,12 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     private $requestStackSize = 0;
     private $resetServices = false;
 
-    const VERSION = '4.2.6-DEV';
+    const VERSION = '4.2.6';
     const VERSION_ID = 40206;
     const MAJOR_VERSION = 4;
     const MINOR_VERSION = 2;
     const RELEASE_VERSION = 6;
-    const EXTRA_VERSION = 'DEV';
+    const EXTRA_VERSION = '';
 
     const END_OF_MAINTENANCE = '07/2019';
     const END_OF_LIFE = '01/2020';