How can I write a `body_io` response from `HTTP::Client.get` to a `Tempfile` instance? I've been trying stuff like this
```
HTTP::Client.get(url) do |response|
  tempfile = Tempfile.open("file", ".zip") do |file|
    file.write response
  end
  # do stuff
  tempfile.unlink
end
```
But it doesn't work