Comparisons in .where cause crash

Hi 👋

I'm facing a weird issue, when I run this code:
```swift
// initial.id is a UUID

let search = Search(graph: Globals.graph).where(
.type("Customers", using: &&)
&& "id" == initial.id as CVarArg // <- Is it the good way?
)
```

This causes a crash (here is the crashlog: https://pastebin.com/uk6em3p1).

But if I run this code, it works:
```swift
let search = Search(graph: Globals.graph).where(.type("Customers"))
let entity = search.sync().filter {
$0["id"] as! UUID == initial.id
}
```

Am I doing something wrong with the new API or is it a library issue?
Thanks!