acme4j#acme4j v5.0.0 is there. It supports dns-persist-01 now (see https://letsencrypt.org/2026/02/18/dns-persist-01.html).
Although it is a major update, it does not break anything unless you use `Login.getKeyPair()` or `Login.getAccountLocation()` in your code.
DNS-PERSIST-01: A New Model for DNS-based Challenge Validation
When you request a certificate from Let’s Encrypt, our servers validate that you control the hostnames in that certificate using ACME challenges. For subscribers who need wildcard certificates or who prefer not to expose infrastructure to the public Internet, the DNS-01 challenge type has long been the only choice. DNS-01 works well. It is widely supported and battle-tested, but it comes with operational costs: DNS propagation delays, recurring DNS updates at renewal time, and automation that often requires distributing DNS credentials throughout your infrastructure.
