Create build.yml

Author: ikskuh

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+    # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+    - uses: actions/checkout@v2
+
+    - name: Setup Zig
+      uses: goto-bus-stop/setup-zig@v1.2.3
+      with:
+        version: master
+    
+    - name: Run tests
+      run: |
+        zig test known-folders.zig