1, Lumen 5.2.0
The lumen 5.2.0 is upgraded to use the Laravel 5.2 component and is adjusted at the lumen bottom.
Only stateless APIs are available
Lumen 5.2 did a great job of lumen--focusing only on providing a stateless JSON API. Therefore, the framework will no longer support sessions and views (view), and if you want to use these features, you need to use the full Laravel framework. Upgrading lumen to Laravel is simple: just copy your routing and Code class to the newly installed Laravel app, and because Laravel and lumen share a lot of components, the code class you write yourself basically doesn't need to be modified.
Certification
Since the session is no longer supported by lumen, authentication must be stateless via API token or request header. In the new authserviceprovider you have complete control over the certification process, check out the lumen certification documentation to learn more.
Test
Because lumen no longer supports sessions and views, all relevant test functions are removed. Testing of the JSON API has been preserved and the lumen test documentation has been reviewed for more information.
2, Lumen 5.1.0
Lumen 5.1.0 upgrades the framework to use Laravel 5.1, new features such as event broadcasts, intermediate price parameters, and test optimizations can be used in the new version of Lumen. For the complete Laravel 5.1 release notes, view the Laravel documentation.
Previous release notes, view Lumen official website.