Need to process the body and status code of the response with an error

[fpawel]

Now in the case of a non-200 response code, calling the Client.Subscribe method returns an error without any information about the response

func (c *Client) SubscribeWithContext(ctx context.Context, stream string, handler func(msg *Event)) error {
	operation := func() error {
		...
		} else if resp.StatusCode != 200 {
			resp.Body.Close()
			return fmt.Errorf("could not connect to stream: %s", http.StatusText(resp.StatusCode))
		...

F.e. on 203 - could not connect to stream: Non-Authoritative Information
This is not appropriate in cases where the response code and body may provide additional context for client-side processing. For example, the server may respond with 203 + the result of the stream to a GET /events request .
I suppose it's easy to fix.
If I prepare a PR, can I expect it to be approved?