Updates the CHANGES file.

Author: skellock

CHANGES.md

@@ -1,7 +1,8 @@
-### April 22, 2016 - 0.4.0 - UNRELEASED
+### April 23, 2016 - 0.4.0 - UNRELEASED
 
 * `NEW` a way to configure options on the client - thx [@gantman](https://github.com/gantman)
 * `NEW` a master switch to turn off everything in 1 spot - thx [@gantman](https://github.com/gantman)
+* `FIX` fixed the optional user agent assignment issues
 
 ### April 22, 2016 - 0.3.0