test VS2022 in CI

Author: bernhardmgruber

.github/workflows/ci.yaml

@@ -78,7 +78,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2016, windows-2019]
+        os: [windows-2016, windows-2019, windows-2022]
     steps:
     - uses: actions/checkout@v2
       with: