[doc] Updating readme with version 3.0.0 notice #20

README.md

@@ -5,9 +5,13 @@
 
 Node.JS module that adds emitter capabilities to [Primus](https://github.com/3rd-Eden/primus).
 
-### Compatibility
+## Compatibility
 
-`primus-emitter@2.1.x` is compatible with [primus@2.x.x](https://github.com/primus/primus/releases/tag/2.0.0) as well as with the `primus@1.x.x` series.
+`primus-emitter@3.x.x` is now compatible with [primus@2.x.x](https://github.com/primus/primus/releases/tag/2.0.0) series, if for some reason you need to continue using an old version of `primus` then you can always go back and install a previous version of `primus-emitter` like so:
+
+```bash
+$ npm install primus-emitter@2.0.5
+```
 
 ## Instalation