Bump jinja2 from 2.10 to 2.10.1 in /{{cookiecutter.app_name}}

Bumps [jinja2](https://github.com/mitsuhiko/jinja2) from 2.10 to 2.10.1.
- [Release notes](https://github.com/mitsuhiko/jinja2/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/docs/changelog.rst)
- [Commits](https://github.com/mitsuhiko/jinja2/compare/2.10...2.10.1

)

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