Add version guard around non-default gems.

ioquatix · ioquatix · commit e2d8e309680f · 2026-04-01T19:18:47.000+13:00
diff --git a/Gemfile b/Gemfile
@@ -15,8 +15,11 @@ end
 gem "rubocop", require: false
 
 group :test do
-  gem "logger"
-  gem "ostruct"
+  if RUBY_VERSION >= "4"
+    gem "logger"
+    gem "ostruct"
+  end
+
   gem "webrick" # gemified in Ruby 3.1+
   gem "psych"
 end
