That sounds good to me. I'm setting up the RC2 builds now, so we can
update our Cabal copy to the latest release after that, for the final
release. Right now we're at e97aa58f68519db54de1c62339459ebb88aed069,
which is just ahead of 1.18.1.3.
As Duncan noted to me, we'll also have to do a cabal-install release,
to make sure that it can build with the adjusted version bounds
present in 7.8.