• Remove deprecated Tooltips API class (replaced by TooltipBuilder)
• Remove other deprecated methods
• Implement IAdvancedItem into AdvancedArmorItem and replace the current hooks with the ones provided by the interface
• Move registry classes from core to core.registry
• Move utility classes from core to core.util
• Move ModTooltips to core.util and remove deprecated methods within the class
• Completely remove content package and classes within the package
• Rename subfolders of assets/textures to be non-plural

1.13.0-1.19