Bump ujson from 2.0.3 to 3.0.0

Bumps [ujson](https://github.com/ultrajson/ultrajson) from 2.0.3 to 3.0.0.
- [Release notes](https://github.com/ultrajson/ultrajson/releases)
- [Commits](ultrajson/ultrajson@2.0.3...3.0.0)

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

requirements.txt

@@ -34,7 +34,7 @@ six==1.15.0
 transaction==3.0.0
 translationstring==1.3
 typing==3.7.4.1
-ujson==2.0.3
+ujson==3.0.0
 urllib3==1.25.9
 venusian==3.0.0
 waitress==1.4.4