Nav methods

Using nav methods

Lusift.next() progresses the guide to the next step

Lusift.prev() takes the guide to the previous step

Lusift.goto(index: number) sets the current step index to index

Lusift.close() closes the active guide prematurely, without finishing it.

This method doesn't prevent lusift from checking for and displaying valid async steps, use Lusift.disable() in conjuction for that.