Search queries should throw validation error if unknown keys are used

**Is your feature request related to a problem? Please describe.**
When creating a query, if a query-type doesn't exist, no warning/error is thrown. Instead, the query-type is ignored

e.g: If you use `were` instead of `where`, it should throw an error:

```json
{
	...
	"were": {
		...
	}
}
```

**Describe the solution you'd like**
The request should fail with a validation error