Add typing-extensions to dependencies

[jlondonobo]

What's the issue?

fastexcel uses typing_extensions:

fastexcel/python/fastexcel/__init__.py

Line 5 in 8169053

from typing_extensions import TypeAlias

However, typing_extensions is not part of dependencies in pyproject.toml

This causes a ModuleNotFoundError when fastexcel is installed by itself.

How to reproduce the bug?

1. Create a virtual environment:

python -m venv .venv/
source .venv/bin/activate

2. Install fastexcel:

pip install -e .
python

3. Import fastexcel

import fastexcel

Error message

Python 3.12.2 (main, Feb 20 2024, 04:06:49) [Clang 14.0.0 (clang-1400.0.29.202)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import fastexcel
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/joselondono/Documents/forks/fastexcel/python/fastexcel/__init__.py", line 5, in <module>
    from typing_extensions import TypeAlias
ModuleNotFoundError: No module named 'typing_extensions'

[PrettyWood]

Hello @jlondonobo
Thank you for the great report! You're absolutely right.

[PrettyWood]

closed by #227