[Snyk] Security upgrade zipp from 1.2.0 to 3.19.1

[bashtage]

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

Snyk changed the following file(s):

• requirements-dev.txt

⚠️ Warning

``` flake8 5.0.4 has requirement importlib-metadata<4.3,>=1.1.0; python_version < "3.8", but you have importlib-metadata 6.7.0. ```

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[!IMPORTANT]

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• 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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.78%. Comparing base (65de143) to head (83da5a2). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #393 +/- ## ======================================= Coverage 98.78% 98.78% ======================================= Files 56 56 Lines 8670 8670 Branches 659 659 ======================================= Hits 8565 8565 Misses 80 80 Partials 25 25 ```

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