`onShown` and `onHidden` continue appearing in the doc after been removed

**Do you want to request a *feature* or report a *bug*?**
bug

**What is the current behavior?**
The current doc continues showing `onShown` and `onHidden` which were removed https://fkhadra.github.io/react-contexify/api/menu

**What is the expected behavior?**
Delete the props from the doc and show an alternative to 'execute a callback' if the menu was shown.

Open the API/menu documentation page linked in the issue and inspect the sections describing onShown and onHidden. Remove those obsolete props and document the supported alternative for executing a callback when the menu is shown; verify the rendered page no longer lists the removed props.

Written by the indexing model from the issue text.