Upgrade to GHC-8.8.1

[recursion-ninja]

These dependencies are currently stopping our upgrade:

• [x] attoparsec
• [x] cabal-doctest
• [x] microlens
• [x] polyparse
• [x] vector-th-unbox

[recursion-ninja]

Cabal still isn't building with ghc-8.8.1 because of cassava, our barely used CSV rendering dependency.

I think it's because cabal-3.0 handles the packages flags slightly differently, and cassava uses a lot of cabal build flags to decide which bytestring library to use.

[recursion-ninja]

@Boarders can you look into why cabal-3.0 and cassava aren't working together? I'm stumped.

Maybe we can make a cabal.freeze file to fix some dependencies and force cassava to not fail?

[recursion-ninja]

Let's drop the cassava dependency and use unlines . fmap (intercalate ",").

[wardwheeler]

There’s a solution

[recursion-ninja]

We removed the cassava dependency from our project. See 75222d520f6c1031632d5d83b423602cca04f55a.

Our project now builds with ghc-8.8.1 on both cabal-3.0 and stack. We can consider merging the ghc-8.8.1 branch into master in the near future.

[Boarders]

Excellent to hear!

[wardwheeler]

Nice

[recursion-ninja]

master is compiling ghc-8.8.1. See a9c71f97e1d5e4a07dae6741897b5481488b9277.