Update the changelog

CHANGELOG.md

@@ -17,6 +17,8 @@ The format is loosely based on [Keep a Changelog](http://keepachangelog.com/en/1
 
 * Subscription to mocked events used to be handled less strictly than subscription to regular CLI events. As with the latter, subscribing to mocked events now also requires all handlers to have the same delegate type. (@stakx, #891)
 
+* Moq will throw when it detects that an argument matcher will never match anything due to the presence of an implicit conversion operator. (@michelcedric, #897, #898)
+
 #### Added
 
 * Added support for setup and verification of the event handlers through `Setup[Add|Remove]` and `Verify[Add|Remove|All]` (@lepijohnny, #825)