ruby 3.4 test support

Author: ahaverbuch

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: [3.2, 3.3]
+        ruby-version: [3.2, 3.3, 3.4]
     steps:
       - uses: actions/checkout@v4
         with: