enum.nonmember has the wrong type

### Summary

https://play.ty.dev/2314690d-c925-4cc1-a5cc-418c928628ca

```python
from typing import reveal_type
import enum

class E(enum.Enum):
    A = enum.auto()
    X = enum.nonmember(123)

reveal_type(E.X)  # Revealed type: `Unknown | nonmember[int]`
```

This really should just be `int`.

### Version

ty 0.0.2