Bump jinja2 from 2.9.6 to 2.11.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.9.6 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@2.9.6...2.11.3)

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

Pipfile

@@ -13,7 +13,7 @@ url = "https://pypi.python.org/simple"
 
 flask = "==0.12.2"
 flask-wtf = "==0.14.2"
-"jinja2" = "==2.9.6"
+"jinja2" = "==2.11.3"
 markupsafe = "==1.0"
 wtforms = "==2.1"
 werkzeug = "==0.12.2"