[Regression] You can't return jQuery Terminal instance from interpreter anymore

[jcubic]

Issue summary

You should be able to return JQuery Terminal instance from the interpreter

Expected behavior

The return value should be ignored

Steps to reproduce

• link to repro

Browser and OS

Additional notes

I think that this was working. So you can have code that early return:

$('body').terminal({
  test(x = null) {
    if (!x) {
      return this.error('x is required');
    }
    this.echo(x);
  }
}, {
  checkArity: false
});

This regression probably happened when echo started accepting jQuery objects.