[JS] Create Field with List type will throw error

 
const field_vector=new ApacheArrow.Field(
  "field_vector",
  new ApacheArrow.List(new ApacheArrow.Float32(), 4),
  false
);
 
Will throw error TypeError: Cannot read property 'children' of undefined
Source code: https://github.com/apache/arrow/blob/master/js/src/schema.ts#L137
 
If it's a bug, i'd like to fix this.