Bump jinja2 from 2.10 to 2.11.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.10 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...2.11.3)

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

Author: dependabot[bot]

requirements.txt

@@ -101,7 +101,7 @@ idna==2.6
 invoke==0.22.1
 isodate==0.6.0
 itsdangerous==0.24
-Jinja2==2.10
+Jinja2==2.11.3
 jsonschema==2.6.0
 keyring==12.0.1
 lockfile==0.12.2