update Swift version in README

Author: DivineDominion

README.md

@@ -4,7 +4,7 @@
 
 # FatSidebar
 
-![Swift 4.2](https://img.shields.io/badge/Swift-4.2-blue.svg?style=flat)
+![Swift 5.0](https://img.shields.io/badge/Swift-5.0-blue.svg?style=flat)
 ![Version](https://img.shields.io/github/tag/CleanCocoa/FatSidebar.svg?style=flat)
 ![License](https://img.shields.io/github/license/CleanCocoa/FatSidebar.svg?style=flat)
 ![Platform](https://img.shields.io/badge/platform-macOS-lightgrey.svg?style=flat)
@@ -90,7 +90,7 @@ struct OmniFocusTheme: FatSidebarTheme {
 
 ## Code License
 
-Copyright (c) 2017 Christian Tietze. Distributed under the MIT License.
+Copyright (c) 2019 Christian Tietze. Distributed under the MIT License.
 
 ## Icon License