Fix options getter for in-viewport modifier so it returns correct object

[vstefanovic97]

I found the options passed to the in-viewport modifier were being ignored. Turns out if we run

const { onEnter, onExit, ...options } = this.args.named;
return options; // it returns { options: {} }

But we need it to return the contents of the options object. You can check this on a simple example

const {...options } = { options: {foo: '42'}};
console.log(options); // logs {options: {…}}
// instead we want it to just log {foo: 42}

[vstefanovic97]

Turns out this modifier never expected to get options as an argument, sorry for the confusion. I'm closing this PR