Bump ujson from 3.0.0 to 3.1.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@3.0.0...3.1.0)

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

requirements.txt

@@ -29,7 +29,7 @@ simplejson==3.17.2
 six==1.15.0
 transaction==3.0.0
 translationstring==1.4
-ujson==3.0.0
+ujson==3.1.0
 urllib3==1.25.10
 venusian==3.0.0
 waitress==1.4.4