run against different redis versions

.github/workflows/tests.yaml

@@ -5,18 +5,17 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
-    services:
-      redis:
-        image: redis
-        ports:
-          - '6379:6379'
-
     strategy:
       matrix:
         go-version: [ '1.19', '1.20', '1.21.x' ]
+        redis-version: [4, 5, 6, 7]
 
     steps:
       - uses: actions/checkout@v4
+      - name: Start Redis
+        uses: supercharge/redis-github-action@1.7.0
+        with:
+          redis-version: ${{ matrix.redis-version }}
       - name: Setup Go
         uses: actions/setup-go@v4
         with: