[Snyk] Security upgrade cryptography from 2.8 to 41.0.4

[jantman]

This PR was automatically created by Snyk using the credentials of a real user.

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:
  • requirements.txt

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	611/1000 Why? Recently disclosed, Has a fix available, CVSS 6.5	Denial of Service (DoS) SNYK-PYTHON-CRYPTOGRAPHY-5914629	cryptography: 2.8 -> 41.0.4	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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🦉 Denial of Service (DoS)

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -3.27% ⚠️

Comparison is base (130935c) 50.42% compared to head (1d15039) 47.15%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #285      +/-   ##
==========================================
- Coverage   50.42%   47.15%   -3.27%     
==========================================
  Files          82       82              
  Lines        5263     5263              
  Branches      810      810              
==========================================
- Hits         2654     2482     -172     
- Misses       2556     2746     +190     
+ Partials       53       35      -18     

Flag	Coverage Δ
acceptance	?
unittests	47.15% <ø> (ø)

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see 12 files with indirect coverage changes

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