chore(requirements): update jmespath to 0.9.3

See https://github.com/jmespath/jmespath.py/blob/develop/CHANGELOG.rst#093

Author: mboersma

rootfs/requirements.txt

@@ -8,7 +8,7 @@ djangorestframework==3.6.3
 docker-py==1.10.6
 gunicorn==19.7.1
 idna==2.5
-jmespath==0.9.2
+jmespath==0.9.3
 jsonfield==2.0.1
 jsonschema==2.6.0
 morph==0.1.2