Device Authorization Grant login library

since version 13.0.0 introduced the device authorization grant I am wondering which library (and how) supports it. I know I can perform the login using any REST library, but I would prefer to let a library do the raw stuff.
Additionally, I would prefer a library that doesn’t need a framework like spring. Keycloak Installed would be fine for example, but it doesn’t seem to be able to perform the new grant.