converting obj to array to avoid errors with funky/blank objects on d…

…eserialization

src/WP_CLI/SearchReplacer.php

@@ -119,7 +119,7 @@ private function run_recursively( $data, $serialised, $recursion_level = 0, $vis
 						)
 					);
 				} else {
-					foreach ( $data as $key => $value ) {
+					foreach ( (array) $data as $key => $value ) {
 						$data->$key = $this->run_recursively( $value, false, $recursion_level + 1, $visited_data );
 					}
 				}