Upgrade to GHC 8.8.3

[tuomohopia]

I'm trying to plug wrecker as a part of my benchmarks suite in the project. As the project uses a newer GHC, I can't compile wrecker under the same project

My API is Servant so I could just reuse all existing API types with wrecker if it was compatible with the newer GHCs.

What's the path for upgrading wrecker to a new GHC, say lts-15.5 / GHC 8.8.3?

[lorenzo]

I haven’t investigated that yet, but feel free to submit a pull request with the changes if you have the time. I can help if you get stuck or have questions