prepared the 2.5.0 release

CHANGELOG

@@ -1,4 +1,4 @@
-* 2.5.0 (2018-XX-XX)
+* 2.5.0 (2018-07-13)
 
  * deprecated using the spaceless tag at the root level of a child template (noop anyway)
  * deprecated the possibility to define a block in a non-capturing block in a child template

lib/Twig/Environment.php

@@ -16,12 +16,12 @@
  */
 class Twig_Environment
 {
-    const VERSION = '2.5.0-DEV';
+    const VERSION = '2.5.0';
     const VERSION_ID = 20500;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 5;
     const RELEASE_VERSION = 0;
-    const EXTRA_VERSION = 'DEV';
+    const EXTRA_VERSION = '';
 
     private $charset;
     private $loader;