[#84] Add support for GHC 9.4.2

[german1608]

Resolves #84

Adds support for GHC 9.4.2. Additionally, the colourista package declaration was updated so for cabal installs it uses the new hackage version (0.1.0.2) which supports 9.2.4, and also has a convenient base bound. For stack, I couldn't find a stackage for it, so I just pinned the commit from https://github.com/kowainik/colourista/commit/c7b06816ab85c27439fa7afbe6d5eed0506dd884

I also added Cabal 3.8 and GHC 9.4.2 to the build matrix for the cabal job. Let me know if we can just replace the existing cabal 3.6 with 3.8, or if it's okay to use both.

Additional tasks

• [x] Documentation for changes provided/changed: Not needed
• [x] Tests added: Existing tests suffice.
• [x] Updated CHANGELOG.md: Should I do this?

[german1608]

Workflow execution sample on my fork: https://github.com/german1608/iris/actions/runs/3202513553