Configure to_time_preserves_timezone

This hides a warning when running tests.

config/quickdraw.rb

@@ -15,6 +15,7 @@ class App < Rails::Application
 	config.autoload_paths << "#{root}/app/view_components"
 	config.secret_key_base = "secret-key"
 	config.action_dispatch.show_exceptions = :rescuable
+	config.active_support.to_time_preserves_timezone = :zone
 
 	routes.append do
 		resources :posts