Update dependencies, upgrade to Rails 7.1, require Ruby 3.x

config/application.rb

@@ -42,7 +42,5 @@ module Akkounts
 
     config.active_job.queue_adapter = :sidekiq
     config.action_mailer.deliver_later_queue_name = nil # use "default" queue
-
-    config.active_record.legacy_connection_handling = false
   end
 end

config/environments/test.rb

@@ -26,7 +26,7 @@ Rails.application.configure do
   config.cache_store = :null_store
 
   # Raise exceptions instead of rendering exception templates.
-  config.action_dispatch.show_exceptions = false
+  config.action_dispatch.show_exceptions = :none
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false