Bump jinja2 from 2.7.2 to 2.11.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.7.2 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.7.2...2.11.3)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

setup.py

@@ -119,7 +119,7 @@
         "aniso8601==1.2.0",
         "Flask==0.12.2",
         "Flask-RESTful==0.3.4",
-        "Jinja2==2.7.2",
+        "Jinja2==2.11.3",
         "MarkupSafe==0.23",
         "SQLAlchemy==1.2.19",
         "Werkzeug==0.12.2",