update copyright message
@@ -2,7 +2,7 @@ Unity Test API
==============
[![Unity Build Status](https://api.travis-ci.org/ThrowTheSwitch/Unity.png?branch=master)](https://travis-ci.org/ThrowTheSwitch/Unity)
-__Copyright (c) 2007 - 2019 Unity Project by Mike Karlesky, Mark VanderVoord, and Greg Williams__
+__Copyright (c) 2007 - 2020 Unity Project by Mike Karlesky, Mark VanderVoord, and Greg Williams__
Getting Started
===============
