Update CHANGES.md

Author: MarcinOrlowski

CHANGES.md

@@ -6,7 +6,7 @@ See [compatibility docs](docs/compatibility.md) for details about backward compa
 
 ## CHANGE LOG ##
 
-* dev
+* v3.0.0 (2017-02-23)
    * **BACKWARD INCOMPATIBILE CHANGES**
    * [RB-17] `success()` now allows to return API code as well
    * Corrected default config file containing faulty and unneeded `use` entries