Prepare the 3.3.9 release

CHANGELOG

@@ -1,4 +1,4 @@
-# 3.3.9 (2022-XX-XX)
+# 3.3.9 (2022-03-25)
 
  * Fix custom escapers when using multiple Twig environments
  * Add support for "constant('class', object)"

src/Environment.php

@@ -38,12 +38,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    public const VERSION = '3.3.9-DEV';
+    public const VERSION = '3.3.9';
     public const VERSION_ID = 30309;
     public const MAJOR_VERSION = 3;
     public const MINOR_VERSION = 3;
     public const RELEASE_VERSION = 9;
-    public const EXTRA_VERSION = 'DEV';
+    public const EXTRA_VERSION = '';
 
     private $charset;
     private $loader;