oops wrong date

Author: Phil Sturgeon

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [1.0.0] - 2019-01-20
+## [1.0.0] - 2020-01-20
 
 ### Changed
 - Moved over to the `@openapi-contrib` NPM organization.