Windows and Intl fixes

Author: nicolas-grekas

Extension/Core/Type/DateType.php

@@ -260,7 +260,7 @@ private function formatTimestamps(\IntlDateFormatter $formatter, $regex, array $
         $pattern = $formatter->getPattern();
         $timezone = $formatter->getTimezoneId();
 
-        if ($setTimeZone = method_exists($formatter, 'setTimeZone')) {
+        if ($setTimeZone = PHP_VERSION_ID >= 50500 || method_exists($formatter, 'setTimeZone')) {
             $formatter->setTimeZone('UTC');
         } else {
             $formatter->setTimeZoneId('UTC');