COPYING in bitcoin-ruby-0.0.14 vs COPYING in bitcoin-ruby-0.0.15

@@ -1,5 +1,5 @@
-Copyright (c) 2017 Julian Langschaedel <[e-mail]>
+Copyright (c) 2018 Julian Langschaedel <[e-mail]>
 
 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 the Software without restriction, including without limitation the
 rights to use, copy, modify, merge, publish, distribute, sublicense, and/or