Bump pyyaml from 5.3.1 to 5.4 in /roles/prepare_build/files (#376)

Bump pyyaml from 5.3.1 to 5.4 in /roles/prepare_build/files

Bumps pyyaml from 5.3.1 to 5.4.

Changelog
Sourced from pyyaml's changelog.

5.4 (2021-01-19)

yaml/pyyaml#407 -- Build modernization, remove distutils, fix metadata, build wheels, CI to GHA
yaml/pyyaml#472 -- Fix for CVE-2020-14343, moves arbitrary python tags to UnsafeLoader
yaml/pyyaml#441 -- Fix memory leak in implicit resolver setup
yaml/pyyaml#392 -- Fix py2 copy support for timezone objects
yaml/pyyaml#378 -- Fix compatibility with Jython




Commits

58d0cb7 5.4 release
a60f7a1 Fix compatibility with Jython
ee98abd Run CI on PR base branch changes
ddf2033 constructor.timezone: _copy & deepcopy
fc914d5 Avoid repeatedly appending to yaml_implicit_resolvers
a001f27 Fix for CVE-2020-14343
fe15062 Add 3.9 to appveyor file for completeness sake
1e1c7fb Add a newline character to end of pyproject.toml
0b6b7d6 Start sentences and phrases for capital letters
c976915 Shell code improvements
Additional commits viewable in compare view




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Reviewed-by: None <None>
Reviewed-by: Anton Kachurin <katchuring@gmail.com>
Reviewed-by: Anton Sidelnikov <None>

roles/prepare_build/files/requirements.txt

@@ -3,7 +3,7 @@ csm-test-utils==0.2.12
 boto3==1.10.13
 botocore==1.13.13
 cryptography==3.3.2
-PyYAML==5.3.1
+PyYAML==5.4
 
 ansible==2.9.16
 ansible-lint>=4.1.0,<5.0