made inventory slotsLeft function work with stacks of items larger than max stack size, implemented inventory spaceLeft
made inventory slotsLeft function work with stacks of items larger than max stack size, implemented inventory spaceLeft

gnomesley/mineflayer,PrismarineJS/mineflayer,andrewrk/mineflayer,crazy2be/mineflayer,crazy2be/mineflayer,crazy2be/mineflayer,crazy2be/mineflayer