[Snyk] Security upgrade tornado from 6.2 to 6.4.2

[bashtage]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• doc/requirements.txt

⚠️ Warning

sphinx 5.3.0 has requirement docutils<0.20,>=0.14, but you have docutils 0.20.1.
notebook 6.5.7 requires pyzmq, which is not installed.
jupyter-server 1.24.0 requires pyzmq, which is not installed.
jupyter-console 6.6.3 requires pyzmq, which is not installed.
jupyter-client 7.4.9 requires pyzmq, which is not installed.
ipykernel 6.16.2 requires pyzmq, which is not installed.

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.
• 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.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.57%. Comparing base (3111b39) to head (69e5f6f).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #630   +/-   ##
=======================================
  Coverage   99.57%   99.57%           
=======================================
  Files         100      100           
  Lines       17283    17283           
  Branches     1445     1445           
=======================================
  Hits        17209    17209           
  Misses         28       28           
  Partials       46       46           

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