fix(import): iterator was already closed error

Author: IvanChepurnyi

src/Command/ImportCommand.php

@@ -98,7 +98,7 @@ public function execute(InputInterface $input, OutputInterface $output): int
         )->create();
 
         $inputSource = new JsonImportSourceFactory($input->getArgument('directory'), $config);
-        $tables = $inputSource->listTables();
+        $tables = iterator_to_array($inputSource->listTables());
 
         foreach ($tables as $table) {
             $importer->cleanTable($table);