message: add release date to 3.4.0
diff: @@ -8,7 +8,7 @@ All notable changes to this project will be documented in this file. This projec
  * Suppress npm update warnings in log output ([#66](https://github.com/oznu/homebridge-config-ui-x/issues/66))
  -## 3.4.0
  +## 3.4.0 (2018-03-22)
  ### Notable Changes
  