updated VERSION for 2.0.18

Author: fabpot

src/Symfony/Component/HttpKernel/Kernel.php

@@ -56,12 +56,12 @@ abstract class Kernel implements KernelInterface
  protected $startTime;
  protected $classes;
 
- const VERSION = '2.0.18-DEV';
+ const VERSION = '2.0.18';
  const VERSION_ID = '20018';
  const MAJOR_VERSION = '2';
  const MINOR_VERSION = '0';
  const RELEASE_VERSION = '18';
- const EXTRA_VERSION = 'DEV';
+ const EXTRA_VERSION = '';
 
  /**
  * Constructor.