message: sparkles: Add update notifier functionality
diff: const vorpal = require('vorpal')();
  const Helper = require('./helper/lmHelper');
  require('dotenv').config();
  +const updateNotifier = require('update-notifier');
  +const pkg = require('./package.json');
  if (parseInt(process.version.substr(1, 2)) < 6) {
  console.error('Please use node version >= 6');
  @@ -10,6 +12,7 @@ if (parseInt(process.version.substr(1, 2)) < 6) {
  }
  const versionArg = ['-v', '-V', '--version'];
  +updateNotifier({pkg}).notify();
  // jovo (no arguments)
  if (process.argv.length === 2) {
  