0.5.0-rc2

[v0.5.0-rc.2] Single Cookie Scraper (#26)

* feat: automatically terminate cookie server if duo auth happens after init

* feat: use exponential backoff for determining delay

* refactor: fix notifier to use new API, 5 min cooldown, auth support

* docs: include link to nonexistent wiki

* chore: update version

* chore: update cargo.lock dependency versions