add ci workflow

.github/workflows/ci.yaml

@@ -0,0 +1,31 @@
+name: ci
+on:
+  pull_request:
+    branches:
+      - master
+jobs:
+  test:
+    name: Test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    env:
+      VERBOSE: 1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.20'
+          cache: false
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+          args: --timeout 5m0s
+      - name: Run fmt
+        run: go fmt ./...
+      - name: Run vet
+        run: go vet ./...
+      - name: Run tests
+        run: go test -v ./...