Add Ruby 3.4 to CI

Author: slonopotamus

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         # Test oldest and newest supported versions
-        ruby: ['jruby', '2.6', '3.2']
+        ruby: ['jruby', '2.6', '3.4']
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps: