Problem: not able to automatically catch problems on Ruby 3.4

Only when I am using another machine with Ruby 3.4 (or somebody else does)

Solution: include Ruby 3.4 into the CI routine

.github/workflows/main.yml

@@ -15,6 +15,7 @@ jobs:
       matrix:
         ruby:
           - '3.3.5'
+          - '3.4.1'
 
     steps:
     - uses: actions/checkout@v4