This release brings one bug fix where we would attempt to initialise logging twice if the plugin is invoked twice. This would cause the second attempt to invoke the plugin to silently fail.
The release also includes some special behaviour inherited from pam_ssh_agent_auth where authentication would succeed if the calling service is sshd and the environment variable SSH_AUTH_INFO_0 contains a public key matching one of the public keys this plugin is configured with. See the new section in README.md for additional detail.