Add element to Shiny input

[timelyportfolio]

Normally in React this would be not be considered best practice but in the case of Shiny we know that element is stable across a session.

Also, many of the npm dependencies are out-of-date, so potentially at the risk of confusing this with that, went ahead and upgraded all npm dependencies. JS tests all passed.

https://github.com/react-R/reactvega/blob/master/srcjs/reactvega.jsx is an example usage of new functionality that allows us to add the el id to our Shiny input value for the purpose of referencing in Shiny with observe/observeEvent. I don't think there is any other way to accomplish otherwise.

[timelyportfolio]

• document change
• add NEWS.md item
• minor increment version

[timelyportfolio]

@glin I have tested with reactable but would you be able to confirm that there is nothing breaking in these changes? Thanks so much.

The el change does not apply to htmlwidgets so hopefully nothing there, but there is a small chance that npm updates might affect.

[glin]

@timelyportfolio Confirmed, all looks good here!