unstar method
Unstars the specified repository for the currently authenticated user.
API docs: https://developer.github.com/v3/activity/starring/#unstar-a-repository
Implementation
Future unstar(RepositorySlug slug) {
return github.request('DELETE', '/user/starred/${slug.fullName}',
headers: {'Content-Length': '0'}).then((response) {
return null;
});
}