Makes requests to Flickr.
error_t() :: Flickrex.Request.HttpClient.error_t
success_t() :: Flickrex.Request.HttpClient.success_t
t() :: %Flickrex.Request{body: iodata | tuple, headers: [{binary, binary}], http_client: term, http_opts: Keyword.t, method: String.t, url: String.t}
request(t) :: success_t | error_t