rails.rb in sentry-rails-4.3.0

- old
+ new

@@ -1,6 +1,7 @@
 require "sentry-ruby"
 require "sentry/integrable"
+require "sentry/rails/background_worker"
 require "sentry/rails/configuration"
 require "sentry/rails/engine"
 require "sentry/rails/railtie"
 require "sentry/rails/tracing"
 