Events for when unauthenticated requests reach the limit

[ruisilva450]

Hi,

I'm coming from this closed issue #8 because I'm having this issue as well.
I need to handle when the unauthenticated requests reach the limit.

I noticed that the GitHubActivity.feed({ username: "my-username", selector: ".selector" }); doesn't return a callback of any kind.

Can this be implemented?
Thanks