wait for redis to be ready before proceeding with tests

Author: patinthehat

.github/workflows/run-tests.yml

@@ -18,6 +18,11 @@ jobs:
     services:
       redis:
         image: redis
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
         ports:
           - 6379:6379