Azure-ci-core has a strict dependency on an very old PyJWT

[sodul]

az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Describe the bug
The setup.py for azure-cli-core explicitly requires PyJWT==1.7.1 while all the other azure packages are more relaxed with >=1.0.0,<3.

https://github.com/Azure/azure-cli/blob/dev/src/azure-cli-core/setup.py#L61

To Reproduce
pip install azure-cli alongside more recent packages that need PyJWT>= 2.0.

pip install azure-cli==2.22.1 PyJWT==2.1.0
... 
ERROR: Cannot install PyJWT==2.1.0 and azure-cli-core==2.22.1 because these package versions have conflicting dependencies.

The conflict is caused by:
    The user requested PyJWT==2.1.0
    azure-cli-core 2.22.1 depends on PyJWT==1.7.1

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies
WARNING: You are using pip version 21.0.1; however, version 21.1.1 is available.

Expected behavior
We should not have a version conflict with newer versions of PyJWT when installing the latest azure cli.

Environment summary
Installed with python 3.9.4 on linux and macOS. Pip 21.0.1.

Additional context
PyJWT 1.7.1 was released on 2018. This bug relates to #17598.

[yonzhan]

@jiasli for awareness

[fshabashev]

affects me as well