Description:
------------
The argument type hint of function intltz_from_date_time_zone is wrong.


php_intl.c line 448

  ZEND_ARG_OBJ_INFO( 0, dateTimeZone, IntlDateTimeZone, 0 )


IntlDateTimeZone should be DateTimeZone

Test script:
---------------
<?php
$f = new ReflectionFunction('intltz_from_date_time_zone');
var_dump($f->getParameters()[0]->getClass());

Expected result:
----------------
class ReflectionClass#2 (1) {
  public $name =>
  string(12) "DateTimeZone"
}

Actual result:
--------------
PHP Fatal error:  Uncaught exception 'ReflectionException' with message 'Class IntlDateTimeZone does not exist'