ci: github actions workflow

.github/workflows/tests.yml

@@ -0,0 +1,41 @@
+name: testing
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        go: ["1.16", "1.17", "1.18", "1.19"]
+        include:
+          - go: "1.16"
+            GO_VERSION: "~1.16.0"
+          - go: "1.17"
+            GO_VERSION: "~1.17.0"
+          - go: "1.18"
+            GO_VERSION: "~1.18.0"
+          - go: "1.19"
+            GO_VERSION: "~1.19.0"
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Set up Go ${{ matrix.go }}
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.GO_VERSION }}
+          check-latest: true
+
+      - name: Check out the source code
+        uses: actions/checkout@v3
+
+      - name: Run tests
+        run: go test -v -race