Use setTimeZone if this method exists.

The php version is not a critical factor to choose the method, but we have to use setTimeZone, if it exists.

Author: dropfen

Extension/Core/Type/DateType.php

@@ -267,8 +267,10 @@ private function formatTimestamps(\IntlDateFormatter $formatter, $regex, array $
     {
         $pattern = $formatter->getPattern();
         $timezone = $formatter->getTimezoneId();
+        // Use it, if exists.
+        $setTimeZone = method_exists($formatter, 'setTimeZone');
 
-        if (version_compare(\PHP_VERSION, '5.5.0-dev', '>=')) {
+        if ($setTimeZone) {
             $formatter->setTimeZone('UTC');
         } else {
             $formatter->setTimeZoneId('UTC');
@@ -286,7 +288,7 @@ private function formatTimestamps(\IntlDateFormatter $formatter, $regex, array $
             $formatter->setPattern($pattern);
         }
 
-        if (version_compare(\PHP_VERSION, '5.5.0-dev', '>=')) {
+        if ($setTimeZone) {
             $formatter->setTimeZone($timezone);
         } else {
             $formatter->setTimeZoneId($timezone);