Add cryptography as dependency (for app-based auth)

[jodelasur]

Using the new app-based auth results to the error below when cryptography is not installed. It should be added as a dependency of this.

Traceback (most recent call last):
  File "***", line 60, in ***
    github = Github(
  File "/usr/local/lib/python3.9/site-packages/github/MainClass.py", line 122, in __init__
    self.__requester = Requester(
  File "/usr/local/lib/python3.9/site-packages/github/Requester.py", line 332, in __init__
    self._refresh_token()
  File "/usr/local/lib/python3.9/site-packages/github/Requester.py", line 396, in _refresh_token
    self.__installation_authorization = self._get_installation_authorization()
  File "/usr/local/lib/python3.9/site-packages/github/Requester.py", line 377, in _get_installation_authorization
    integration = GithubIntegration.GithubIntegration(
  File "/usr/local/lib/python3.9/site-packages/github/GithubIntegration.py", line 52, in __init__
    jwt=self.create_jwt(),
  File "/usr/local/lib/python3.9/site-packages/github/GithubIntegration.py", line 106, in create_jwt
    encrypted = jwt.encode(payload, key=self.private_key, algorithm="RS256")
  File "/usr/local/lib/python3.9/site-packages/jwt/api_jwt.py", line 67, in encode
    return api_jws.encode(json_payload, key, algorithm, headers, json_encoder)
  File "/usr/local/lib/python3.9/site-packages/jwt/api_jws.py", line 152, in encode
    alg_obj = self.get_algorithm_by_name(algorithm_)
  File "/usr/local/lib/python3.9/site-packages/jwt/api_jws.py", line 91, in get_algorithm_by_name
    raise NotImplementedError(
NotImplementedError: Algorithm 'RS256' could not be found. Do you have cryptography installed?

[s-t-e-v-e-n-k]

We probably need an extra of jwt, looking at the traceback.

[EnricoMi]

@jodelasur maybe you had package jwt installed, which conflicts with PyJWT, which is a dependency of PyGithub?

If you'd uninstall jwt and reinstalled PyGithub, it should work.

[EnricoMi]

It looks like PyGithub has to depend on PyJWT[crypto] to pull in the cryptography package correctly.

So if you do a pip install "pyjwt[crypto]>=2.4.0", everything should work with 1.58.0.

[EnricoMi]

This issue has been seen in #1165 and fixed only for testing. Before, this has been addressed in #557 and #554.