update changelog

CHANGELOG.md

@@ -104,7 +104,7 @@ Map<{ a?: string }>({ a: 'a' }).delete('a'); // you can only delete an optional
 
 #### Are all `Map` methods implemented ?
 
-For now, only `get`, `getIn`, `set`, `update`, `delete` and `remove` methods are implemented. All other methods will fallback to the basic `Map` definition. Other method definition will be added later, but as some might be really complex, we prefer the progressive enhancement on the most used functions.
+For now, only `get`, `getIn`, `set`, `update`, `delete`, `remove`, `toJS`, `toJSON` methods are implemented. All other methods will fallback to the basic `Map` definition. Other method definition will be added later, but as some might be really complex, we prefer the progressive enhancement on the most used functions.
 
 ## [4.3.3] - 2023-08-23