es6 modules for Node.js v11

(experimental feature) with Minecraft like OOP

https://nodejs.org/api/esm.html

Assertion failed: No temperature provided for DesertBiome
TaigaBiome {
  entityList: [ Zombie { health: 100, type: 'BigFoot' } ],
  biomeTemp: 0,
  rainFall: 'snow' }
DesertBiome {
  entityList: [ Zombie { health: 100, type: 'Husk' } ],
  biomeTemp: 40,
  rainFall: null }
PlainsBiome {
  entityList: [ Zombie { health: 100, type: 'Zombie' } ],
  biomeTemp: 30,
  rainFall: 'rain' }