Update example code - workinging with haxe 4.3.4 / tink

[realGnargh]

smtpmailer.SmtpMailer.connect({
  host: 'hostname',
  port: 587,
  auth: {
    username: 'user',
    password: 'pass'
  }
}).next(mailer ->
  mailer.send(email).next(
    _ -> mailer.close()
  )
).handle(function(res) {
  switch res {
    case Success(_):
      trace('Email sent!');
    case Failure(e): {
      trace('Something went wrong: '+e);
    }
  }
});

should change too

    _ -> mailer.close

(no brackets)

as you get an error in current version:

characters 20-34 : Cannot use Void as value

[kevinresol]

I think you should replace .next with .withSideEffect instead