add github actions

.github/workflows/tests.yaml

@@ -0,0 +1,26 @@
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+
+name: tests
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.18.x]
+        platform: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.platform }}
+
+    steps:
+    - uses: actions/setup-go@v3
+      with:
+        go-version: ${{ matrix.go-version }}
+    - uses: actions/checkout@v3
+
+    - name: Run go test
+      run: go test -v -race -covermode atomic ./...