add renderText to change log

Author: Dan Carbonell

CHANGELOG.md

@@ -88,6 +88,10 @@
 
 - We have removed the `this` class component reference from the prop functions in `MessageSimple`. For example, if you wish to override the SDK's standard long press behavior on a message, the `onLongPress` function passed in to `MessageSimple` no longer takes the `this` component reference as it's first argument. The message and the event object become the first and second arguments, respectively.
 
+*renderText Function*
+
+- The `renderText` function utilized in the `MessageTextContainer` component now accepts a single object containing `markdownRules`, `markdownStyles`, and `message`. Previously each value was it's own function parameter.
+
 ## [1.2.0] 2020-08-21
 
 **NO BREAKING CHANGES**