Enable stack in GitHub CI

lukel97 · lukel97 · commit c9e25f7f4bf6 · 2020-10-15T00:01:03.000+01:00
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -28,6 +28,7 @@ jobs:
       with:
         ghc-version: ${{ matrix.ghc }}
         cabal-version: '3.2'
+        enable-stack: true
 
     - name: Cache Cabal
       uses: actions/cache@v2
