Emiel Witting

also the minimum width is 4 bits, so "width = max(width,4)" could be added. source: https://minecraft.gamepedia.com/Chunk_format#Block_format (at BlockStates)

I changed the serialize _blockstates function in world.py too, so now writing blocks works again and the enitre library should be compatible with 1.16, I haven't run into any problems...