Deprecate `PromiseValue`

[remcohaszing]

microsoft/TypeScript#45350 introduces the Awaited type, which does the same thing (but more advanced).

This is part of TypeScript 4.5.

TypeScript blog

[sindresorhus]

Yup. We should add a deprecation doc comment tag to the type and deprecate it in the docs. We will not remove it for a long time though.

[remcohaszing]

My bad, Awaited is similar to PromiseValue, not Promisable.

[liuhanqu]

#322
I create a PR to fix this issue