Today we released WP OAuth Server 3.1.93. This version of WP OAuth Server is mainly a minor release. The OAuth2 Library used was updated and then ported into the WP OAuth2 project. This release utilizes better handling of id_tokens as well as allows for non-expiring refresh tokens.
Next scheduled release is version 3.2.0.
If there is any questions or concerns, please feel free to leave a comment or submit a support request.