Release 1.6.4

Author: colinodell

src/CommonMarkConverter.php

@@ -27,7 +27,7 @@ class CommonMarkConverter extends MarkdownConverter
      * @deprecated in 1.5.0 and will be removed from 2.0.0.
      *   Use \Composer\InstalledVersions provided by composer-runtime-api instead.
      */
-    public const VERSION = '1.6-dev';
+    public const VERSION = '1.6.4';
 
     /**
      * Create a new commonmark converter instance.