Add static binaries for ghc-8.8.4

Author: lukel97

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ghc: ['8.10.1', '8.8.3', '8.8.2', '8.6.5', '8.6.4']
+        ghc: ['8.10.1', '8.8.4', '8.8.3', '8.8.2', '8.6.5', '8.6.4']
         os: [ubuntu-latest, macOS-latest, windows-latest]
         exclude:
           - os: windows-latest
@@ -23,7 +23,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: true
-    - uses: actions/setup-haskell@v1.1.1
+    - uses: bubba/setup-haskell@d8110230d
       with:
         ghc-version: ${{ matrix.ghc }}
         cabal-version: '3.2'