chore: Use ES6 to write functions (#2185)
chore: Use ES6 to write functions (#2185)

Use ES6 to write functions for 'm.read' and 'Object.keys.forEach' in 'build.js'.
nodejs/new.nodejs.org,phillipj/new.nodejs.org,yous/new.nodejs.org,yous/new.nodejs.org,phillipj/new.nodejs.org,nodejs/new.nodejs.org