Python: Loosen dependency on typing-extensions

[Fokko]

In the CI we pin the typing-extensions dependency on 4.5.0, but it looks like some bug has been introduced in 4.6.1. This PR bumps typing-extensions to 4.6.2.

By loosening this requirement, we install the same version as when someone would when they don't install the dev requirements.

This was broken in Pydantic 1.10.7, and fixed in 1.10.8: pydantic/pydantic#5826

Resolves #7746

[Fokko]

Thanks for the quick review @nastra

[rajaie-sg]

Does a new version need to be released to PyPI? https://pypi.org/project/pyiceberg/#history

I tried 0.3.0 but it still suffers from the issue in #7746

[Fokko]

@rajaie-sg A new version is incoming. The issue should only happen if you also install the dev dependency. Otherwise, you can run pip3 install --upgrade typing-extensions.

[rajaie-sg]

Ah I see, I was running pip3 install "pyiceberg[glue,s3fs,hive]"

[rajaie-sg]

Actually, it looks like the issue here is with pydantic, which is fixed to version 1.10.4 here https://github.com/apache/iceberg/blob/pyiceberg-0.3.0/python/pyproject.toml#LL58C1-L58C9

Even when I run pip3 install --upgrade typing-extensions, I still run into the problem.

It's only when I run pip3 install --upgrade pydantic does the problem get resolved, but this isn't a solution since we are using Poetry and it prevents us from specifying a version of Pydantic other than 1.10.4 in the pyproject.toml file.

pydantic gets installed by default with pyiceberg

I was able to work around this by setting this in my pyproject.toml

typing-extensions ="==4.5.0"

typing-extensions gets installed automatically because it's a dep of pydantic https://github.com/pydantic/pydantic/blob/v1.10.4/setup.py#L132