Unexpected behavior with combination: update & limit

When you try following code when toast container have set limit=1, expected behavior should be same in both runs, but it is not, in the second run it shows fist message and not last (updated):

```
function onClick() {
const id = toast.success('a')
toast.update(id, {render: 'b'})
toast.update(id, {render: 'c'})
}

onClick();
onClick();
```

During first "onClick()" run is eventually (instantly) showed 'c'
After close (manually or after time out), second "onClick()" show 'a' (even twice - but this can be related with another issue)