Auto-renewal does not work

[tinganho]

It seems like the auto-renewal doesn't work. I've got an email from Letsencrypt to renew my current domains.

[bradjones1]

Unfortunately I am not using this in production on my end any longer and so my availability/need to debug this immediately is limited. I am open to pull requests, however. On the nginx version of this project, certbot handles its renewals directly, while this package is using a utility script that is from an upstream library. It is likely the renewal script is no longer valid due to a change in the API.