Adding support for rdb_save & rdb_load

.github/workflows/ci.yml

@@ -13,6 +13,11 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Setup redis
+      uses: shogo82148/actions-setup-redis@v1
+      with:
+        redis-version: 6.0
+        auto-start: "false"
     - name: Build
       run: cargo build --all --all-targets --verbose
     - name: Run tests
@@ -23,6 +28,11 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Setup redis
+      uses: shogo82148/actions-setup-redis@v1
+      with:
+        redis-version: 6.0
+        auto-start: "false"
     - name: Build
       run: cargo build --all --all-targets --verbose
     - name: Run tests