Reduce github scopes

[Taluu]

As discussed on slack, you should reduce the scopes used. Instead of user and repo (and even public_repo as suggested in #71), you could limit yourself to user:email, as the other requests (getting the starred repos and the user information except email) does not need any scopes.

e.g https://api.github.com/users/taluu & https://api.github.com/users/taluu/starred can be accessed through GET requests without any auth.

[j0k3r]

I even don't need the user email at all!

[j0k3r]

Thanks @Taluu !