Some build workflows

.github/workflows/windows.yml

@@ -0,0 +1,29 @@
+name: Windows CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: windows-2019
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: deps
+      run: |
+        cinst wget
+	cinst meson
+	c:\ProgramData\chocolatey\bin\wget.exe http://www.mega-nerd.com/libsndfile/files/libsndfile-1.0.28-w64-setup.exe
+	.\libsndfile-1.0.28-w64-setup.exe /silent /sp- /norestart
+    - name: configure
+      run: |
+        call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
+	meson build
+    - name: make
+      run: |
+        ninja -C build
+