Expose response headers about rfesi HOT 2 OPEN

I've been thinking about how this might be possible. I don't want to append response headers to some sort of public-accessible vec, both because then I'd need to remove items, and also I don't know how I'd make the connection between request-response and headers available to the calling code, given the async nature of the HTTP calls.

I can introduce a new feature that'd change how the query function and all group functions work, so that they'd return either a tuple or struct of the actual endpoint data and the relevant headers.

from rfesi.

Returning a struct with the headers plus the data would make a lot of sense, and should be reasonable for people to work with, as this is what things like reqwest, and other HTTP libraries do.

from rfesi.