Add GitHub actions

.github/workflows/test.yml

@@ -0,0 +1,46 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16.x
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ~/go/pkg/mod
+            ~/.cache/go-build
+            ~/Library/Caches/go-build
+            %LocalAppData%\go-build
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Tidy
+        run: go mod tidy && git diff-index --quiet HEAD || { >&2 echo "Stale go.{mod,sum} detected. This can be fixed with 'go mod tidy'."; exit 1; }
+
+      - name: Test
+        run: go test -count 100 ./...
+
+  golangci-lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest
+          args: --timeout 10m