Missing return statement

```python
In [1]: from distro import uname_info                                              

In [2]: print(uname_info())                                                        
None
```
What does the function below ?
https://github.com/nir0s/distro/blob/d20463809ce8ebb24177ea6df5e371be6d6963e1/distro.py#L868