Merge pull request #53 from nebulab/spaghetticode/new-event-subscribe…

…rs-mappings

Use `Spree::Event. activate_all_subscribers` when available

lib/solidus_support/engine_extensions.rb

@@ -36,7 +36,12 @@ def load_solidus_subscribers_from(path)
           path.glob("**/*_subscriber.rb") do |subscriber_path|
             require_dependency(subscriber_path)
           end
-          Spree::Event.subscribers.each(&:subscribe!)
+
+          if Spree::Event.respond_to?(:activate_all_subscribers)
+            Spree::Event.activate_all_subscribers
+          else
+            Spree::Event.subscribers.each(&:subscribe!)
+          end
         end
       end