https://data.api.abs.gov.au/rest/dataflow api responds with either json or xml response.
Unfortunately, they default to xml response, and the only option to specify json response is via headers, no query params.

To get json response from api, I need to pass headers for accept as application/vnd.sdmx.structure+json; charset=utf-8.
Is there any way to pass headers to the request uri ?

- name: "test_request_headers"
    uri: "https://data.api.abs.gov.au/rest/dataflow"
    option:
        format: "json"