Increase version number in sao.js

issue11852

src/sao.js

@@ -1,7 +1,7 @@
 /* This file is part of Tryton.  The COPYRIGHT file at the top level of
    this repository contains the full copyright notices and license terms. */
 var Sao = {
-    __version__: '6.6.0',
+    __version__: '6.7.0',
 };
 
 (function() {