Merge pull request #3 from pceuropa/dependabot/pip/pyyaml-5.1

Bump pyyaml from 3.12 to 5.1

Author: pceuropa

requirements.txt

@@ -120,7 +120,7 @@ PyJWT==1.6.1
 python-dateutil==2.7.2
 python-editor==1.0.3
 pytz==2018.4
-PyYAML==3.12
+PyYAML==5.1
 requests==2.20.0
 requests-oauthlib==0.8.0
 SecretStorage==2.3.1