TypeError: unsupported operand type(s) for <<: 'int' and 'Integer'

Hello,

I'm encountering an error when running the following code on Windows using Python 3.10 with the latest version of the library:

```python
def config2params(self, config: dict) -> dict:
params = super().config2params(config)
if "log_max_bin" in params:
params["max_bin"] = (1 << params.pop("log_max_bin")) - 1
return params
```

The error I'm encountering is: "TypeError: unsupported operand type(s) for <<: 'int' and 'Integer'" and it occurs on the following line:

```python
1006 │ params["max_bin"] = (1 << params.pop("log_max_bin")) - 1
```

It seems that `log_max_bin` is not an **int**, but rather a **flaml.tune.sample.Integer**, and even after trying to convert it to int(), it still doesn't work.

I would greatly appreciate any suggestions on how to fix this issue.

Thank you!

Best regards,
Andrej