we need 8.8.3 for downstream stuff

Author: Patrick Thomson

.github/workflows/haskell.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ghc: ["8.10.1"]
+        ghc: ["8.8.3", "8.10.1"]
         cabal: ["3.2.0.0"]
 
     steps: