Test more downstream code on CI

[whitequark]

No description provided.

[gasche]

While we are at it, could we have an ocb_stubblr-using dependency? It would make sense to have one dependency for all non-trivial ocamlbuild plugins out there: cppo also comes to mind; there is also the namespace-as-ocamlbuild plugin, but I don't know if it is used in opam-released packages, and Solvuu (again, not sure).

[whitequark]

While we are at it, could we have an ocb_stubblr-using dependency? It would make sense to have one dependency for all non-trivial ocamlbuild plugins out there: cppo also comes to mind

Added both.

Solvuu (again, not sure).

The dependencies seem quite heavy (they all need core_kernel...)

[gasche]

Ok, this sounds like a nice compromise. Feel free to merge once we get CI results or whenever.

[gasche]

(Are you the kind of person that prefer other people to merge their PRs, or to have a chance to do a last amending round before merging themselves?)

[whitequark]

(Are you the kind of person that prefer other people to merge their PRs, or to have a chance to do a last amending round before merging themselves?)

It does not matter to me very much. Unless explicitly noted my PR commit stacks are always ready to merge; I rebase before every push.