Support for GHC 9.14

[LaurentRDC]

GHC 9.14 comes with base 4.22, which is currently not supported by boring. I believe that all that is needed is a revision.

[andreasabel]

[__6] rejecting: unix-2.8.8.0/installed-460b (conflict: boring => base>=4.12.0.0 && <4.22, unix => base==4.22.0.0/installed-8900)

[andreasabel]

This is the last dependency blocking haskell-server:

• Support GHC 9.14 haskell/hackage-server#1496

[jonathanknowles]

Hi @phadej

I made a PR for GHC 9.14 support here:

• Fix warnings and support GHC 9.14.1. #49