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] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -14,7 +14,7 @@ decorator==4.1.2
 fabric3==1.14.post1
 flake8==3.5.0
 isort==5.7.0
-jinja2==2.9.6
+jinja2==2.11.3
 multidict==5.1.0
 nose==1.3.7
 numpy==1.14.2