interactiveTolerance parameter did not work

Configuration:

```javascript
$('#credits-link').tooltipster({
	animation: 'fade',
	content: $('#credit-info-content').html(),
	trigger: 'hover',
	maxWidth: 300,
	interactive: true,
	interactiveTolerance: 2000
});
```

Tooltip disappers immediately no matter which value interactiveTolerance is set with.