Update copyright date

mattrubin · mattrubin · commit 34318498f940 · 2018-09-17T16:34:28.000-04:00
diff --git a/Authenticator/Source/AppController.swift b/Authenticator/Source/AppController.swift
@@ -2,7 +2,7 @@
 //  AppController.swift
 //  Authenticator
 //
-//  Copyright (c) 2016-2017 Authenticator authors
+//  Copyright (c) 2016-2018 Authenticator authors
 //
 //  Permission is hereby granted, free of charge, to any person obtaining a copy
 //  of this software and associated documentation files (the "Software"), to deal
