chore: update changelog

Author: hswolff

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file. See [standa
 <a name="2.0.0"></a>
 # [2.0.0](https://github.com/mongodb-js/connect-backbone-to-react/compare/v1.6.1...v2.0.0) (2020-01-15)
 
-
+* Now requires at least React v16.3.0.
 
 <a name="1.6.1"></a>
 ## [1.6.1](https://github.com/mongodb-js/connect-backbone-to-react/compare/v1.6.0...v1.6.1) (2018-10-26)