Test running style_check on multiple Ruby versions

Author: ashmaroli

.github/workflows/ci.yml

@@ -39,6 +39,8 @@ jobs:
       fail-fast: false
       matrix:
         ruby_version:
+          - "2.7"
+          - "3.2"
           - "3.3"
     steps:
       - uses: actions/checkout@v4