Extra hover:bg-*  in class generated for btn-outline-*

Thanks for making this tool!

I think I found a small issue:

```css
.btn-outline-primary {
	@apply text-blue-600 border-blue-600 hover:bg-blue-600 hover:text-white bg-white hover:bg-blue-600;
}
```

has `hover:bg-blue-600` twice. 