PHP 8.5: Prevent deprecation notices for curl_close

`curl_close` is deprecated in PHP 8.5+, and hasn't been doing anything since PHP 8.0.

To prevent deprecation warnings it should therefore be called on older versions of PHP only.

See https://wiki.php.net/rfc/deprecations_php_8_5#deprecate_no-op_functions_from_the_resource_to_object_conversion.

Author: TobiasBg

src/Transport/Curl.php

@@ -127,7 +127,7 @@ public function __construct() {
 	 * Destructor
 	 */
 	public function __destruct() {
-		if (is_resource($this->handle)) {
+		if (is_resource($this->handle) && \PHP_VERSION_ID < 80000) {
 			curl_close($this->handle);
 		}
 	}
@@ -323,7 +323,9 @@ public function request_multiple($requests, $options) {
 				}
 
 				curl_multi_remove_handle($multihandle, $done['handle']);
-				curl_close($done['handle']);
+				if (\PHP_VERSION_ID < 80000) {
+					curl_close($done['handle']);
+				}
 
 				if (!is_string($responses[$key])) {
 					$options['hooks']->dispatch('multiple.request.complete', [&$responses[$key], $key]);