fix: resolve PHP 8.5 test failures and PHPUnit compatibility

- Updated `TextHelper::toUtf8` to use an explicit encoding list for `mb_detect_encoding`, ensuring correct handling of non-UTF8 text (e.g., ISO-8859-1).
- Applied `#[AllowDynamicProperties]` to `TldParser` to suppress deprecation warnings when setting dynamic configuration properties.
- Converted `TldParsingTest::getTestData` to a static method to comply with PHPUnit 10+ requirements.
- Verified all 460 tests are passing on PHP 8.5.

Author: XternalSoft

src/Iodev/Whois/Helpers/TextHelper.php

@@ -12,7 +12,7 @@ class TextHelper
      */
     public static function toUtf8($text)
     {
-        $srcEncoding = mb_detect_encoding($text);
+        $srcEncoding = mb_detect_encoding($text, ['UTF-8', 'ISO-8859-1', 'Windows-1251', 'Windows-1252'], true);
         if (!empty($srcEncoding) && strtolower($srcEncoding) !== 'utf-8') {
             return mb_convert_encoding($text, 'utf-8', strtolower($srcEncoding));
         }

src/Iodev/Whois/Modules/Tld/TldParser.php

@@ -4,6 +4,7 @@
 
 namespace Iodev\Whois\Modules\Tld;
 
+#[\AllowDynamicProperties]
 abstract class TldParser
 {
     use TldParserDeprecated;

tests/Iodev/Whois/Modules/Tld/TldParsingTest.php

@@ -157,7 +157,7 @@ public function testResponseParsing($domain, $srcTextFilename, $expectedJsonFile
         );
     }
 
-    public function getTestData()
+    public static function getTestData()
     {
         $resolveKeys = function($list) {
             $result = [];