Support for template-haskell 2.19?

[Demonstrandum]

The latest GHC versions use template-haskell-2.19.0.0, but this package is incompatible.

Unfortunately all GHC versions before 9.4.2 cause segfaults on my machine, otherwise I would just downgrade.

[nmeum]

FYI: freer-simple works fine for me with GHC 9.4.4 if I build my cabal project with --allow-newer so I guess this just requires widening the template-haskell dependency accordingly?

[andreasabel]

freer-simple is part of Stackage LTS 23.18 (GHC 9.8) but only thanks to my revision.
The relaxation of constraints on template-haskell should be merged into this repo.