Merge pull request #502 from 2amigos/bs5-master-readme

Add info about BS5 dev in master's readme

README.md

@@ -27,10 +27,21 @@ module is built to work out of the box with some minor config tweaks and it come
 We considered that RBAC was essential to be included into any user management module, even if you simply use one user 
 with `admin` role, its much better to actually work with RBAC just in case your application scales in the future.
 
-## Documentation 
+## Boostrap 4 and 5 support
 
-You can read the latest docs on [http://yii2-usuario.readthedocs.io/en/latest/](http://yii2-usuario.readthedocs.io/en/latest/)
+With the release of 1.6, contributors started implementing changes for supporting newer versions of the Boostrap library,
+being Usuario stuck at 3.
+
+Up until around May 2023, the `master` branch will remain stable, so devs who in these years relied on it for
+deployment can have time to migrate to a stable version.
+BS5 development is ongoing on branch [`2.0.0-dev`](https://github.com/2amigos/yii2-usuario/tree/v2.0.0-dev),
+which will eventually be merged in `master` around May.
+
+You can check issues #476, #488, #500 for updates, or the [branch itself](https://github.com/2amigos/yii2-usuario/tree/v2.0.0-dev).
 
+## Documentation
+
+You can read the latest docs on [http://yii2-usuario.readthedocs.io/en/latest/](http://yii2-usuario.readthedocs.io/en/latest/)
 
 ## Need Help?