[anywidget] Deprecation Warning. Direct export of a 'render' will likely be deprecated in the future

[mattijn]

I noticed the following warning in the console log when running a JupyterChart:

widget.js:118  [anywidget] Deprecation Warning. Direct export of a 'render' will likely be deprecated in the future. To migrate ...

Remove the 'export' keyword from 'render'
-----------------------------------------

export function render({ model, el }) { ... }
^^^^^^

Create a default export that returns an object with 'render'
------------------------------------------------------------

function render({ model, el }) { ... }
         ^^^^^^
export default { render }
                 ^^^^^^

To learn more, please see: manzt/anywidget#395