I noticed that in https://github.com/facebook/hermes/blob/main/doc/Features.md, there are a few items which are unclear which part of these features are missing/still in progress:

• let and const (block scoped variables, with support for the temporal dead zone)
• Async function (async and await)

I have a project running with Hermes which is using these language features, so I am having a hard time understanding this part of your documentation. I would appreciate it, if someone could clarify that for me.