PyJSONB/PyJSON can't handle jsons with nested lists

psqlpy-v0.7.8
The following code raises: 
`psqlpy.exceptions.PyToRustValueMappingError: Can't convert value from python to rust type: Your value in dict isn't supported by JSON
`
```python
from psqlpy.extra_types import PyJSON

PyJSON({"data": [{"hello":"there"}]})
```