GitHub Actions install Windows SDK 8

See actions/runner-images#842 (comment)

.github/workflows/build.yml

@@ -121,13 +121,20 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: microsoft/setup-msbuild@v1
-    - uses: actions/setup-node@v1
-      with:
-        node-version: '12'
-        registry-url: 'https://registry.npmjs.org'
-    - run: npm ci
-    - run: chocolatey install make -y
-    - run: chocolatey install gnuwin32-coreutils.portable -y
+    # Currently the VireoSDK.sln needs Windows SDK 8.1 which is not included on GitHub Actions by default
+    # see https://github.com/actions/virtual-environments/issues/842#issuecomment-643382166
+    - name: Install Windows 8.1 SDK
+      run: |
+        Invoke-WebRequest -Method Get -Uri https://go.microsoft.com/fwlink/p/?LinkId=323507 -OutFile sdksetup.exe -UseBasicParsing
+        Start-Process -Wait sdksetup.exe -ArgumentList "/q", "/norestart", "/features", "OptionId.WindowsDesktopSoftwareDevelopmentKit", "OptionId.NetFxSoftwareDevelopmentKit"
+      shell: powershell
+    # - uses: actions/setup-node@v1
+    #   with:
+    #     node-version: '12'
+    #     registry-url: 'https://registry.npmjs.org'
+    # - run: npm ci
+    # - run: chocolatey install make -y
+    # - run: chocolatey install gnuwin32-coreutils.portable -y
     - run: msbuild /m /p:Configuration=Debug Vireo_VS\VireoCommandLine.sln
 
   linux: