Merge pull request #13 from atlassian-labs/dependabot/pip/pyyaml-5.4

Bump pyyaml from 5.3 to 5.4

Author: bmcalary-atlassian

requirements.txt

@@ -2,4 +2,4 @@ boto3==1.11.5
 cachelib==0.1
 cachetools==4.0.0
 coloredlogs==10.0
-PyYAML==5.3
+PyYAML==5.4