Is LibreSSL affected? - Downgrade Attack on TLS 1.3 https://news.ycombinator.com/item?id=19111707

https://www.nccgroup.trust/us/about-us/newsroom-and-events/blog/2019/february/downgrade-attack-on-tls-1.3-and-vulnerabilities-in-major-tls-libraries/

No one knows that LibreSSL is affected by CVE-2018-12404, CVE-2018-19608, CVE-2018-16868, CVE-2018-16869, and CVE-2018-16870 or not. 

Does anybody has any info about it?
LibreSSL doesn't support TLS 1.3.