Update README.md

Author: mikebronner

README.md

@@ -62,6 +62,7 @@ The following are packages we have identified as incompatible:
 - [chelout/laravel-relationship-events](https://github.com/chelout/laravel-relationship-events)
 - [spatie/laravel-query-builder](https://github.com/spatie/laravel-query-builder)
 - [dwightwatson/rememberable](https://github.com/dwightwatson/rememberable)
+- [kalnoy/nestedset](https://github.com/kalnoy/nestedset)
 
 ### Things That Don't Work Currently
 The following items currently do no work with this package: