Bump requests from 2.6.0 to 2.20.0

dependabot[bot]

2020-02-19 fbde6d20ead158ce0cd8469d3ae27e9d6322a405

 requirements.txt

@@ -1,3 +1,3 @@
Flask==1.0.2
gunicorn==19.9.0
requests==2.6.0
requests==2.20.0