update year, lol i'm so late with this

Akuli · Akuli · commit 011b01ffb710 · 2018-11-30T14:18:21.000+02:00
diff --git a/LICENSE b/LICENSE
@@ -1,7 +1,7 @@
 The instructions and text in this tutorial (the "software") are licensed
 under the zlib License.
 
-      (C) 2016-2017 Akuli
+      (C) 2016-2018 Akuli
 
       This software is provided 'as-is', without any express or implied
       warranty.  In no event will the authors be held liable for any damages
