Bump jinja2 from 2.10.1 to 2.11.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.10.1 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@2.10.1...2.11.3)

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

requirements.txt

@@ -6,7 +6,7 @@ chardet==3.0.4
 docutils==0.14
 idna==2.6
 imagesize==1.0.0
-Jinja2==2.10.1
+Jinja2==2.11.3
 jsonpointer==2.0
 jsonschema==3.2.0
 MarkupSafe==1.0