The source project of this merge request has been removed.
This patch makes GHC 8.8 the minimum bootstrap compiler across all
Docker images in preparation for the same requirement being imposed
on GHC. In most cases, I was able to use 8.8.3. The exception is
x86_64-linux-deb10, where the only 8.8 bindist I could find was
8.8.1.
Note that I was unable to install cabal-install-3.0.0.0 on
x86_64-linux-alpine, even after lots of struggled attempts to do
so. As a result, I have settled for cabal-install-2.4.1.0 on that
distro. This probably isn't the worst thing in the world, given that
x86_64-linux-deb10 also combines GHC 8.8 with
cabal-install-2.4.1.0.