This change silently added a new build dependency. Any reason why?

Looking at the setup.py, the dependency on typing_extensions is still present:

    python_requires=">=3.7",
    install_requires=[
        "requests>=2.21.0",
        "six>=1.11.0",
        "typing-extensions>=4.6.0",
    ],

There is a syntax error, this should have never been accepted. :-(

I have reverted this change for now.