Get remaining arguments

```javascript
program
  .version(version)
  .allowUnknownOption()
  .option('-a --option-a', 'Option A')
  .parse(process.argv);
```

I call my program with `./my/program --option-a 123 --option-b --option-c 567`. Is there a way to get the remaining options (b & c), either as an object or as an rawArgs array?