Flesh out ghc versions

Author: lukel97

.github/workflows/haskell.yml

@@ -10,20 +10,16 @@ jobs:
  strategy:
  matrix:
  os: [ubuntu-latest , macOS-latest] # , windows-latest]
- ghc: ['8.6.5', '8.4.4']
+ ghc: ['8.6.5', '8.6.4', '8.6.3', '8.6.2', '8.6.1', '8.4.4', '8.4.3', '8.4.2']
 
  steps:
-# - name: Install ghc and cabal-install
-# if: startsWith(matrix.os, 'macOS')
-# run: brew install ghc cabal-install
  - uses: actions/checkout@v1
  with: 
  submodules: recursive
  - uses: bubba/setup-haskell@macos-ghcup
  with:
  ghc-version: ${{matrix.ghc}}
  cabal-version: '3.0'
-# if: startsWith(matrix.os, 'ubuntu')
  - name: Install dependencies
  run: |
  cabal update