Test on Ruby 3.4

Author: janko

.github/workflows/ci.yml

@@ -15,9 +15,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["ruby-2.6", "ruby-2.7", "ruby-3.0", "ruby-3.1", "ruby-3.2", "ruby-3.3", "jruby-9.4"]
+        ruby: ["ruby-2.6", "ruby-2.7", "ruby-3.0", "ruby-3.1", "ruby-3.2", "ruby-3.3", "ruby-3.4", "jruby-9.4"]
         gemfile: ["rails-5.1", "rails-5.2", "rails-6.0", "rails-6.1", "rails-7.0", "rails-7.1", "rails-7.2", "rails-8.0"]
         exclude:
+          - ruby: "ruby-3.4"
+            gemfile: "rails-5.2"
+          - ruby: "ruby-3.4"
+            gemfile: "rails-5.1"
           - ruby: "ruby-3.3"
             gemfile: "rails-5.2"
           - ruby: "ruby-3.3"