Fix PHP 8.5 deprecation

Passing strings of more than one byte to ord() is deprecated in PHP 8.5. This change ensures that ord() is only called if the string is one byte.

Author: freost

src/Util/UrlEncoder.php

@@ -56,7 +56,7 @@ public static function unescapeAndEncode(string $uri): string
                 }
             }
 
-            if (\ord($code) < 128) {
+            if (\strlen($code) === 1 && \ord($code) < 128) {
                 $result .= self::ENCODE_CACHE[\ord($code)];
                 continue;
             }