[Snyk] Security upgrade mistune from 0.8.4 to 2.0.3

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `pip` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • doc/requirements.txt

⚠️ Warning

pyipv8 2.8.0 requires aiohttp-apispec, which is not installed.
pyipv8 2.8.0 requires aiohttp, which is not installed.

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	479/1000 Why? Has a fix available, CVSS 5.3	Regular Expression Denial of Service (ReDoS) SNYK-PYTHON-MISTUNE-2940625	mistune: 0.8.4 -> 2.0.3	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

Check the changes in this PR to ensure they won't cause issues with your project.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Regular Expression Denial of Service (ReDoS)

[tribler-ci]

Can one of the admins verify this patch?

[drew2a]

The documentation build has finished with the error:

  DEPRECATION: m2r is being installed using the legacy 'setup.py install' method, because it does not have a 'pyproject.toml' and the 'wheel' package is not installed. pip 23.1 will enforce this behaviour change. A possible replacement is to enable the '--use-pep517' option. Discussion can be found at https://github.com/pypa/pip/issues/8559
  Running setup.py install for m2r: started
  Running setup.py install for m2r: finished with status 'error'
  error: subprocess-exited-with-error
  
  × Running setup.py install for m2r did not run successfully.
  │ exit code: 1
  ╰─> [8 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "/tmp/pip-install-1wa07k4s/m2r_dc27f769972b45c2972a278bc0607b96/setup.py", line 14, in <module>
          from m2r import parse_from_file
        File "/tmp/pip-install-1wa07k4s/m2r_dc27f769972b45c2972a278bc0607b96/m2r.py", line 59, in <module>
          class RestBlockGrammar(mistune.BlockGrammar):
      AttributeError: module 'mistune' has no attribute 'BlockGrammar'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: legacy-install-failure

× Encountered error while trying to install package.
╰─> m2r

note: This is an issue with the package mentioned above, not pip.
hint: See above for output from the failure.

[kozlovsky]

sphinxcontrib-openapi compatibility with mistune 2.0.x is not fixed yet, see #6624