iface option for Sender only works once.

Using the below example, only universe 11 is sent via the desired interface, the others are sent via default.

```javascript
const ip = "10.101.100.1";
const sacn11 = new Sender({
    universe: 11,
    iface: ip
});

const sacn12 = new Sender({
    universe: 12,
    iface: ip
});
const sacn13 = new Sender({
    universe: 13,
    iface: ip
});
```