Unfortunately the jar size has increased substantially, due to the use of the adventure API which is not included in spigot. Adventure API is needed for the fake armour stands.

• Tag visibility NEARBY improvements:
  • Use fake armour stands to display stack sizes.
    
  • Only send packets to player if the visibility state changes
• Improve command handling
  • Performance improvements
  • Give command feedback when sub command arguments are incorrect
• Configuration handling changes.
  • We now determine whether a section has been overridden when the plugin loads, rather than each time the config is accessed. This should improve performance
    
  • Copy comments when updating config
• Commands additions
  • Add ability to spawn multiple stacks with '/sm spawn'
    
  • Add modes for '/sm stats'
• Remove warning for console messages (made redundant from the use of armour stands)
• Change lore (not item name) when tool mode is changed