@MangelMaxime I'm not sure what the release cadence for Fable.AST is, do we need to bump the Fable.AST version to 5.0-* as this is technically a change, even though it's an optional property. If we do, now would be the time to align it with the Fable major release version.

In general, Fable.AST was released when the AST changed yes and this one being the first time we need a release since Fable 5.

It make sense to start releasing Fable.AST 5 alpha IHMO.

I will merge all the different pending PRs today or tomorrow and make a new Fable release.