return promise

[IamBeltran]

I change in my project your function promisisfy with little change for return out

const promisify = childProcess => {
  return new Promise((resolve, reject) => {
    try {
      const output = [];
      childProcess.stderr.on('data', data => {
        output.push(
          data
            .toString()
            .replace('\t', ' - ')
            .replace('\n', ''),
        );
      });

      childProcess.on('close', code => {
        if (code !== 0) {
          reject({
            output,
            code,
          });
        } else {
          resolve({
            output,
            code,
          });
        }
      });
    } catch (error) {
      reject(error);
    }
  });
};