Support for top level arrays

Hi great library, nice performance.

Does it support stringifying a top level array?

I can't see a way to define it in the schema, everything seems to be an object. Equivalent in json schema would be something like:
```
{
"type": "array",
"items": {
"properties": {
"name": { "type": "string" },
"lastname": { "type": "string" }
},
"required": ["name", "lastname"]
}
}
```

Thanks!

No file, test, or entry point is named in the issue. Start by tracing how the schema currently requires an object, then define and verify support for a top-level array of objects matching the shown fields.

Written by the indexing model from the issue text.