LICENSE.txt in drain-0.4 vs LICENSE.txt in drain-0.5

@@ -1,5 +1,5 @@
-Copyright © 2015–2018 Damien Robert
+Copyright © 2015–2020 Damien Robert
 
 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,