chore(deps): Update PyYAML (#5509)

iamareebjamal · web-flow · commit 3c7d8c1692e2 · 2019-01-07T03:52:25.000+05:30
diff --git a/requirements/common.txt b/requirements/common.txt
@@ -55,4 +55,4 @@ SQLAlchemy==1.1.15 # 1.2.0 doesn't work, check if any future versions work
 Flask-Elasticsearch
 paypalrestsdk
 eventlet
-PyYAML==3.13
+pyyaml~=4.2b1
