update CI scripts

.github/workflows/windows.yml

@@ -0,0 +1,21 @@
+name: windows
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{matrix.config.os}}
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+        # https://github.com/actions/virtual-environments/tree/main/images/win
+        - { os: "windows-2019", vs: "Visual Studio 2019", arch: "x86" }
+        - { os: "windows-2019", vs: "Visual Studio 2019", arch: "x64" }
+    name: "${{matrix.config.vs}} ${{matrix.config.arch}}"
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: Build && Test
+      run: .ci\build_windows_${{matrix.config.arch}}.bat