cloudflare/tls-tris
crypto/tls, now with 100% more 1.3. THE API IS NOT STABLE AND DOCUMENTATION IS NOT GUARANTEED. Since crypto/tls is very deeply (and not that elegantly) coupled with the Go stdlib, tls-tris shouldn't be used as an external package. It is also impossible to vendor it as crypto/tls because stdlib packages would import the standard one and mismatch.
https://github.com/cloudflare/tls-tris