Merge pull request #74 from diogob/fix-ci

Update ruby versions used for CI

.github/workflows/ruby.yml

@@ -36,7 +36,7 @@ jobs:
     name: test (ruby v${{ matrix.ruby }})
     strategy:
       matrix:
-        ruby: ["2.7", "3.0", "3.1"]
+        ruby: ["3.2", "3.3", "3.4"]
 
     steps:
     - uses: actions/checkout@v2