Update kodistubs requirement from ~=20.0.1 to ~=21.0.0

Updates the requirements on [kodistubs](https://github.com/romanvm/Kodistubs) to permit the latest version.
- [Commits](romanvm/Kodistubs@20.0.1...21.0.0)

---
updated-dependencies:
- dependency-name: kodistubs
  dependency-type: direct:production
...

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

requirements.txt

@@ -2,6 +2,6 @@ requests==2.31.0
 rollbar~=0.15.2
 polib~=1.2.0
 Pillow~=10.2.0
-Kodistubs~=20.0.1
+Kodistubs~=21.0.0
 urllib3~=2.2.1