Add a GitHub action for building with CMake on MSVC.

.github/workflows/c-cpp.yml

@@ -29,6 +29,17 @@ jobs:
     - name: make
       run: make
 
+  build-cmake-msvc:
+
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: cmake
+      run: cmake .
+    - name: build
+      run: cmake --build .
+
   build-cmake-mingw:
 
     runs-on: ubuntu-latest