Bugfix (#7)

* Fixed error on empty robots.txt file

Co-authored-by: Mariia <mariia.kaliuzhnaya@collaborator.pro>

Author: devCollaboratorPro

src/Parser/RobotsTxtParser.php

@@ -68,6 +68,10 @@ private function parseTxt($txt)
     {
         $result = [];
         $lines = array_map('trim', mb_split('\r\n|\n|\r', $txt));
+        // If robots txt is empty
+        if (empty($lines)) {
+            return false;
+        }
         // Parse each line individually
         foreach ($lines as $key => $line) {
             // Limit rule length