function stringToArgs(string) {
  var args = [];

  var parts = string.split(' ');
  var length = parts.length;
  var i = 0;
  var open = false;
  var grouped = '';
  var lead = '';

  for (; i < length; i++) {
    lead = parts[i].substring(0, 1);
    if (lead === '"' || lead === '\'') {
      open = lead;
      grouped = parts[i].substring(1);
    } else if (open && parts[i].slice(-1) === open) {
      open = false;
      grouped += ' ' + parts[i].slice(0, -1);
      args.push(grouped);
    } else if (open) {
      grouped += ' ' + parts[i];
    } else {
      args.push(parts[i]);
    }
  }

  return args;
}
Converts a string to command line args, in particular
groups together quoted values.
This is a utility function to allow calling nodemon as a required
library, but with the CLI args passed in (instead of an object).

@param  {String} string
@return {Array}