Combine the MSVC and UWP workflows

.github/workflows/msvc.yml

@@ -0,0 +1,27 @@
+name: Build (MSVC)
+
+on: [push, pull_request]
+
+jobs:
+  Build:
+    name: ${{ matrix.platform.name }}
+    runs-on: windows-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+        - { name: Windows (x64),          flags: -A x64 }
+        - { name: Windows (x86),          flags: -A Win32 }
+        - { name: Windows (clang-cl x64), flags: -T ClangCL -A x64 }
+        - { name: Windows (clang-cl x86), flags: -T ClangCL -A Win32 }
+        - { name: Windows (ARM64),        flags: -A ARM64 }
+        - { name: UWP (x64),              flags: -A x64 -DCMAKE_SYSTEM_NAME=WindowsStore -DCMAKE_SYSTEM_VERSION="10.0" -DSDL_TEST=OFF }
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Configure CMake
+      run: cmake -B build -DSDL_TEST=ON ${{ matrix.platform.flags }}
+    - name: Build CMake
+      run: cmake --build build/ --config Release --parallel
+