[Snyk] Security upgrade zipp from 3.15.0 to 3.19.1

[transientlunatic]

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

Snyk changed the following file(s):

• requirements.txt

⚠️ Warning

matplotlib 3.5.3 requires pillow, which is not installed.
matplotlib 3.5.3 requires fonttools, which is not installed.

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