[Snyk] Security upgrade pyyaml from 5.3.1 to 5.4

[gavinuhma]

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

⚠️ Warning

flake8-black 0.2.1 requires black, which is not installed.

Vulnerabilities that will be fixed

By pinning:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	876/1000 Why? Mature exploit, Has a fix available, CVSS 9.8	Arbitrary Code Execution SNYK-PYTHON-PYYAML-590151	pyyaml: 5.3.1 -> 5.4	No	Mature

(*) 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 effected dependencies could be upgraded.

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

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For more information: 🧐 View latest project report

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📚 Read more about Snyk's upgrade and patch logic

[codecov[bot]]

Codecov Report

Merging #111 (bd1642a) into master (2b93696) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #111   +/-   ##
=======================================
  Coverage   91.15%   91.15%           
=======================================
  Files          35       35           
  Lines         882      882           
=======================================
  Hits          804      804           
  Misses         78       78           

Flag	Coverage Δ
unittests	91.15% <ø> (ø)

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