Added esversion: 6 and fixed some lint issues
Added esversion: 6 and fixed some lint issues

Nurrl/Duckuino,friendly-spycrab/Duckuino,Nurrl/Duckuino,Nurrl/Duckuino,friendly-spycrab/Duckuino,nixu-corp/Duckuino,nixu-corp/Duckuino