Update VERSION for 5.4.18

Author: fabpot

Kernel.php

@@ -78,12 +78,12 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     private static $freshCache = [];
 
-    public const VERSION = '5.4.18-DEV';
+    public const VERSION = '5.4.18';
     public const VERSION_ID = 50418;
     public const MAJOR_VERSION = 5;
     public const MINOR_VERSION = 4;
     public const RELEASE_VERSION = 18;
-    public const EXTRA_VERSION = 'DEV';
+    public const EXTRA_VERSION = '';
 
     public const END_OF_MAINTENANCE = '11/2024';
     public const END_OF_LIFE = '11/2025';