Bump uwsgi from 2.0.30 to 2.0.31

Bumps [uwsgi](https://uwsgi-docs.readthedocs.io/en/latest/) from 2.0.30 to 2.0.31.

---
updated-dependencies:
- dependency-name: uwsgi
  dependency-version: 2.0.31
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/tarballs.txt

@@ -3,4 +3,4 @@
 django-simple-captcha==0.6.2
 django-vinaigrette==2.0.1
 python-bugzilla==3.3.0
-uWSGI==2.0.30
+uWSGI==2.0.31