add redis service to tests workflow

Author: patinthehat

.github/workflows/run-tests.yml

@@ -4,20 +4,21 @@ on:
   push:
     branches:
       - main
-#  pull_request:
-#    branches:
-#      - main
 
 jobs:
   tests:
 
     runs-on: ubuntu-latest
-
+    
     strategy:
       fail-fast: true
       matrix:
         node-version: [14]
 
+    services:
+      redis:
+        image: redis:6-alpine
+
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2