Add Github Actions Test workflow

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+on:
+  push:
+  pull_request:
+    types: [synchronize]
+  schedule:
+    - cron: "0 0 1,11,21 * *"
+name: Test
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version:
+          - 1.13.x
+          - 1.14.x
+          - 1.15.x
+          - 1.16.x
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Test
+        run: go test ./...