Updated license's year to 2018 (codecombat#4795)

Wilsonlulu · nwinter · commit 4c5c70bee700 · 2018-07-26T12:34:54.000-07:00
diff --git a/LICENSE b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2015 CodeCombat Inc. and other contributors
+Copyright (c) 2015-2018 CodeCombat Inc. and other contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
