Relax upper bound on Cabal dependency to admit Cabal-3.8.1.0

[mpilgrem]

My motivation is that Stack depends on the Hpack library, currently 0.35.0. I would like to move Stack to depend on Cabal-3.8.1.0 but Hpack currently specifies Cabal < 3.7.

However, if the upper bound is relaxed to Cabal < 3.9, hpack-0.35.0 builds without problem (using Stack ***) with:

resolver: lts-19.25 # GHC 9.0.2
extra-deps:
- Cabal-3.8.1.0
- Cabal-syntax-3.8.1.0
- process-1.6.15.0

*** This requires the current development version of Stack. See commercialhaskell/stack#5886.

Could the Cabal file for Hpack on Hackage be revised to relax the upper bound?

[sol]

@mpilgrem thanks for bringing this up. Please open a PR so that we reflect that change in the repository as well. Once CI passes and we have this on main I'm happy to do a Hackage revision.

[sol]

Done.