Merge pull request #288 from PostmonAPI/dependabot/pip/pyyaml-5.4

Bump pyyaml from 4.2b1 to 5.4

Author: iurisilvio

requirements.txt

@@ -6,7 +6,7 @@ packtrack==1.6
 xmltodict
 flake8
 celery[mongodb]<4.0
-PyYAML==4.2b1
+PyYAML==5.4
 requests==2.20.0
 raven==5.11.1
 newrelic==2.66.0.49