github action: install redis

.github/workflows/go.yml

@@ -10,9 +10,20 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        # node-version: [10.x, 12.x, 14.x]
+        redis-version: [6]
+
     steps:
     - uses: actions/checkout@v2
 
+    - name: Start Redis
+      uses: supercharge/redis-github-action@1.2.0
+      with:
+        redis-version: ${{ matrix.redis-version }}
+
     - name: Set up Go
       uses: actions/setup-go@v2
       with: