Use an actual matrix.

Author: ioquatix

.github/workflows/test-sentinel.yaml

@@ -19,6 +19,11 @@ jobs:
         os:
           - ubuntu
 
+        ruby:
+          - "3.1"
+          - "3.2"
+          - "3.3"
+        
         experimental: [false]
 
     steps:

sentinel/docker-compose.yaml

@@ -15,7 +15,7 @@ services:
       - redis-master
       - redis-slave
   tests:
-    image: ruby:latest
+    image: ruby:${RUBY_VERSION:-latest}
     volumes:
       - ../:/code
     command: bash -c "cd /code && bundle install && bundle exec sus sentinel/test"