Bump pyyaml (#466)

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.1.2 to 5.4.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@5.1.2...5.4)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Diff for: build-info-extractor-pip/src/test/resources/org/jfrog/build/extractor/setuppyProject/setup.py

@@ -10,5 +10,5 @@
     author_email='jfrog@jfrog.com',
     url='https://github.com/jfrog/project-examples',
     packages=[],
-    install_requires=['PyYAML==5.1.2', 'nltk==3.4.5'],
+    install_requires=['PyYAML==5.4', 'nltk==3.4.5'],
 )