Well, it's finally here I guess. Some has been changed (since the plugin has been completely rewritten, once again) so I will detail this below.

• Stack data is now stored using NBT rather than YAML files or a database. This means performance and ram usage is much improved.
• New year, new config. You will have to reconfigure everything. Except this time like 90% of the config can be customised for each entity type, so hopefully it pays of.
  
• Stack entity names are now updated when the stack value changes rather than with a task. So performance is much improved again.
• Did I mention performance is improved?

As a result, support for 1.13 and 1.14 has now been dropped. 1.14 support could perhaps be re-added but that would mean project restructuring and I don't have the time for that at the moment. If you need a version for either of these versions ask nicely and I may compile a new version with the improvements from recent pull requests.