Add 201 and 202 to list of redirect status codes

[skion]

When using has_redirect_location I found it unexpected that I got a negative result while using it on a response which did have a Location header.

One could ask the general question whether this method should exclude status codes at all or simply look at the existence of a Location header instead (and ignore the status code). However, I'd like to propose to add at least 201 and 202 to the list of commonly redirected status codes since their responses often include them.

In case of agreement I have a PR pending.