Apple released minor updates to macOS Catalina, iOS 13 for iPhone and iPadOS for iPad today. These updates include a variety of small bug fixes, but no new features.
The iOS update, version 13.1.3, fixes a variety of minor bugs. There is also a new version 13.1.3 for iPadOS to match. Bugs fixed in the Catalina update include one that left Setup Assistant hanging during installation.