Relax lower bound for base for stack-2.9.1, if possible

[mpilgrem]

See issue discussion #5733 (comment), #5733 (comment), #5733 (comment), #5733 (comment).

See commit: bb62917, which relaxes the lower bound in the Cabal file to base >= 4.14.3.0 (GHC 8.10.7) in the master branch. It has been tested on Windows 11 with Cabal (the tool) version 3.6.2.0. If somebody could test on a Unix-like operating system, I would revise the lower bound on Hackage.

[mpilgrem]

On Ubuntu 22.04.1 LTS (on WSL), issue #5878 bites, but Stack 2.9.1 can be built with GHC 8.10.7 and Cabal (the tool) version 3.6.2.0 if process >= 1.6.15.0 is specified in the Cabal file. Tested with:

$ stack setup ghc-8.10.7
$ stack --compiler ghc-8.10.7 exec -- which ghc
/home/mpilgrem/.stack/programs/x86_64-linux/ghc-tinfo6-8.10.7/bin/ghc
$ cabal build --with-compiler /home/mpilgrem/.stack/programs/x86_64-linux/ghc-tinfo6-8.10.7/bin/ghc

I am therefore going to revise the lower bound on Hackage.