FIX Type annoations in vera/bnb.py

[BenjaminBossan]

The file was missing the from __future__ import annotations part. As this code is only running nightly with GPU, the normal CI missed this omission. With this PR, nightly CI should be green again.

When I tested it locally with GPU, I didn't check with Python 3.8, so this error did not occur. Once we stop supporting Python 3.8 very soon, this will also no longer be necessary, but we still need to fix it until then.

[HuggingFaceDocBuilderDev]

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[BenjaminBossan]

TIL! How does this affect?

When you have code like:

def foo(x: list[str]):
    pass

This normally requires Python 3.9+ or you need to use from typing import List and use List[str]. However, with the __future__ import, you can use the type annotation syntax from Python 3.9+ inside of Python 3.8.

[sayakpaul]

Thanks for clarifying!