Dynamic Position feature doesnot work

[shimulroy842]

First of all, thanks for your work in making this library compatible with Svelte out of the box.
In the dynamic position feature from the original version, the selected toast can change its position independently but in this svelte version, it does not work.

// Available positions:
// top-left, top-center, top-right, bottom-left, bottom-center, bottom-right
toast('Hello World', {
  position: 'top-center',
});