Upgrade acme-client to v2.0.5
Let's Encrypt dropped support of unauthenticated GET requests to their staging API. This version uses POST-as-GET requests, which is the recommended method.
This mirrors the change in Omnibus: omnibus-gitlab!3782 (merged)
Full CHANGELOG: https://github.com/unixcharles/acme-client/blob/master/CHANGELOG.md
Diff: https://github.com/unixcharles/acme-client/compare/v2.0.2..v2.0.5
Edited by Stan Hu