This version is probably very buggy because I added type requirements at the very end.

Added

• randomInteger(min: Integer, max: Integer) -> Integer
• randomFloat(min: Float, max: Float) -> Float
• String.length() -> Integer
• String.uppercase() -> String
• String.lowercase() -> String
• Number type/class
• variables/fields have optional required types
• functions have required return types
• function arguments have required types
• methods have required return types
• method arguments have required types
• ItemStack.item

Changed

• Events is now accessed from a static context
• Entity.addCommandTag -> Entity.addTag
• Entity.getCommandTags -> Entity.getTags
• Entity.removeCommandTag -> Entity.removeTag
• Entity.dismountVehicle -> Entity.dismount
• Entity.removeAllPassengers -> Entity.removePassengers
• ServerPlayerEntity.changeGameMode -> ServerPlayerEntity.setGameMode
• Integer now extends Float instead of Float extending Integer
• Events.onPlayerAttackEntity -> Events.onAttackEntity
• Events.onPlayerBreakBlock -> Events.onBreakBlock
• Events.onPlayerCraftItem -> Events.onCraftItem
• Events.onPlayerDropItem -> Events.onDropItem
• Events.onPlayerJump -> Events.onJump
• Events.onPlayerPickupItem -> Events.onPickupItem
• Events.onPlayerRingBell -> Events.onRingBell
• Events.onPlayerSneak -> Events.whileSneaking
• Events.onPlayerUseItem -> Events.onRightClickItem
• Events.onPlayerSendChatMessage -> Events.onSendChatMessage

Fixed

• Dictionaries don't work in nbt elements
• Overriding toString does nothing
• A class with no constructor takes an infinite amount of arguments

Improved

• Error messages

Removed

• Resource syntax due to conflict with variable declaration parsing
  New syntax: namespace:path -> "namespace:path"
  Resources are just strings.