Expose responseURL on returned response object

Address https://github.com/hoppscotch/hoppscotch-extension/issues/41

What does this PR changes?

This expose Axios' response.request.responseURL value of response object, as a response.responseURL:

so that if a HTTP request result in a redirect, the final url after redirect can be retrieved.

For more details and context, please check the linked issue above.

Tested? ✅

Works fine:

locally on Chrome latest: Version 89.0.4389.90 (Official Build) (x86_64). Mac OS BigSur.
Also tested compatible with official https://hoppscotch.io/, at least nothing breaks as far as I can tell.

Sample result:

{
    "status": 200,
    "statusText": "",
    "headers": {  },
    "responseURL": "https://developers.googleblog.com/2018/03/transitioning-google-url-shortener.html",
    "data": "...",
    "timeData": {  }
}

In the sample above I try to proxy request through this extension, the request originally made to https://goo.gl which got redirected to another url. The final url is properly exposed as shown on the screenshot.

Note

The var name responseURL is opinionated, I just derive it from the original Axios' var name, let me know if you prefer other name.

Thanks!

hoppscotch / hoppscotch-extension