added get_debug_type version info.

Author: mumumu

reference/var/versions.xml

@@ -13,6 +13,7 @@
  <function name='get_defined_vars' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7, PHP 8'/>
  <function name='get_resource_id' from='PHP 8'/>
  <function name='get_resource_type' from='PHP 4 &gt;= 4.0.2, PHP 5, PHP 7, PHP 8'/>
+ <function name='get_debug_type' from='PHP 8'/>
  <function name='gettype' from='PHP 4, PHP 5, PHP 7, PHP 8'/>
  <function name='intval' from='PHP 4, PHP 5, PHP 7, PHP 8'/>
  <function name='is_array' from='PHP 4, PHP 5, PHP 7, PHP 8'/>