Test with ruby 3.4

Author: timcraft

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [ '3.1', '3.2', '3.3', jruby, truffleruby ]
+        ruby: [ '3.1', '3.2', '3.3', '3.4', jruby, truffleruby ]
 
     steps:
     - uses: actions/checkout@v4