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](https://github.com/pallets/jinja/compare/2.10.1...2.11.3)

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

requirements.txt

@@ -5,5 +5,5 @@ pandas==0.25.3
 IPython==7.5.0
 matplotlib==3.0.3
 statsmodels==0.9.0
-jinja2==2.10.1
+jinja2==2.11.3
 patsy==0.5.1