Upgrade Jinja2
Upgrade Jinja2

Avoid warnings about Jinja2 security:
CVE-2019-10906
high severity
Vulnerable versions: < 2.10.1
Patched version: 2.10.1
In Pallets Jinja before 2.10.1, str.format_map allows a sandbox escape.

ajdavis/twitter-gender-ratio,ajdavis/twitter-gender-ratio,ajdavis/twitter-gender-distribution,ajdavis/twitter-gender-distribution