Elixir v1.20.0-rc.0 (and rc.1) released: type inference of all constructs

[sabiwara]

@a-maze-d

Only issue I discovered was when running credo which suddenly warns of missing @moduledoc. This started to appear with 1.20.0-rc.0 and is still present in 1.20.0-rc.1.

This has been fixed in credo by @Eiji (already discussed above): Fix 1.20.x compatibility issue with block expression AST by Eiji7 · Pull Request #1241 · rrrene/credo · GitHub.