• [ENHANCEMENT] README.md now contains information about the future outlook of the project wrt to deprecations, features and K8s Sig-Auth acceptance
• [ENHANCEMENT] bump dependencies
• [FEATURE] health endpoint /healthz offered on --proxy-endpoints-port
• [FEATURE] --upstream-client-cert-file enables the kube-rbac-proxy client connecting to upstream to use TLS
• [CHANGE] use cobra and upstream command machinery, introduces deprecation to some flags