Causes program crash when there is not enough data to detect the BOM

[jinliming2]

const parse = require('csv-parse');

const parser = parse({
  bom: true,
  skip_lines_with_error: true,
});

parser.on('readable', () => {
  let record;
  while (record = parser.read()) {
    console.log(record);
  }
});
parser.on('skip', err => console.error('skip invalid record', err));
parser.on('error', err => console.error('csv parse error', err));
parser.on('end', () => console.log('end'));

parser.write(Buffer.from([239]));  // BOM: [239, 187, 191]
parser.write(Buffer.from([187]));
parser.write(Buffer.from([191]));
parser.write('asdasd\n');  // first line of data
parser.end('asd');