Pass object to use external resource

[pikatchu]

Refactor useExternalResource to take an object as a parameter.

The idea is that this:

useExternalResource({ supplier: "foo", resource: "rname", params: ... })

Is more readable than:

useExternalResource("foo", "rname", ...)

[mbouaziz]

I feel like non-object would be much less of an issue if the supplier was a well-typed object rather than a string. I haven't dug in the new API yet to suggest something specific