Add Windows and MacOS CI jobs

Author: Bodigrim

.github/workflows/other.yml

@@ -0,0 +1,42 @@
+name: other
+on:
+  - push
+  - pull_request
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [windows-latest, macOS-latest]
+        ghc: ['latest']
+    steps:
+    - uses: actions/checkout@v2
+    - uses: haskell/actions/setup@v1
+      id: setup-haskell-cabal
+      with:
+        ghc-version: ${{ matrix.ghc }}
+    - name: Update cabal package database
+      run: cabal update
+    - uses: actions/cache@v2
+      name: Cache cabal stuff
+      with:
+        path: |
+          ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+          dist-newstyle
+        key: ${{ runner.os }}-${{ matrix.ghc }}
+    - name: Build
+      run: |
+        cabal sdist -z -o .
+        cabal get zlib-*.tar.gz
+        cd zlib-*/
+        cabal build
+    - name: Haddock
+      run: |
+        cd zlib-*/
+        cabal haddock