fix: getScreenSize return data type error

src/Util/ShellUtil.php

@@ -120,7 +120,7 @@ public static function getScreenSize(bool $refresh = false): array|bool
                     $matches
                 )
             ) {
-                return ($size = [$matches[2], $matches[1]]);
+                return ($size = [(int)$matches[2], (int)$matches[1]]);
             }
 
             // fallback to tput, which may not be updated on terminal resize