Windows 10 version 1909, code named '19H2', is a minor update with a smaller set of enhancements focused primarily on select performance improvements, enterprise features, and quality enhancements. It is now officially known as Windows 10 November 2019 Update.
The final build [as of now] is Windows 10 Build 18363.418.
Microsoft is going to ship Windows 10 19H2 as a cumulative update to Windows 10 users once its development is finished.