fix(CommitizenProvider): assert return value is not None

Author: bearomorphism

commitizen/providers/commitizen_provider.py

@@ -9,7 +9,9 @@ class CommitizenProvider(VersionProvider):
     """
 
     def get_version(self) -> str:
-        return self.config.settings["version"]  # type: ignore[return-value] # TODO: check if we can fix this by tweaking the `Settings` type
+        ret = self.config.settings["version"]
+        assert ret is not None
+        return ret
 
     def set_version(self, version: str) -> None:
         self.config.set_key("version", version)