Remove entries from boost_cache table if node is deleted or unpublished

Issue Summary

Hi all - we're running Boost 6.x-1.18 on a Drupal/Ubercart site. We've noticed that if we unpublish a jersey (for example) and then go to our Jerseys category - the product is showing. We were able to fix this by clearing the Boost cache but this is not ideal, especially when the site is experiencing heavy traffic.

How do we get Boost to remove entries from the cache table as soon as they are unpublished or deleted?

Thanks!

Jason