Support GHC 9.14

[andreasabel]

[__2] rejecting: base-4.22.0.0/installed-1f90 (conflict: pqueue => base>=4.9 && <4.22)

[konsumlamm]

Do you mind waiting until https://github.com/haskell-actions/setup supports GHC 9.14, so that we can test GHC 9.14 in the CI?

[andreasabel]

Ok, then we are blocked on:

• Add metadata for 9.14.1 haskell/ghcup-metadata#350

[konsumlamm]

Blocked on haskellari/indexed-traversable#49.