update pyyaml version to get the security update (aws#1974)

moelasmar · mgrandis · commit 006c18484869 · 2021-09-07T14:20:14.000-07:00
diff --git a/requirements/dev.txt b/requirements/dev.txt
@@ -3,7 +3,7 @@ flake8~=3.8.4
 tox~=3.20.1
 pytest-cov~=2.10.1
 pylint>=1.7.2,<2.0
-pyyaml~=5.3.1
+pyyaml~=5.4
 
 # Test requirements
 pytest~=6.1.1; python_version >= '3.6'
