Update years

phadej · phadej · commit 53665c4d50a8 · 2021-03-17T11:02:06.000+02:00
diff --git a/tree-diff.cabal b/tree-diff.cabal
@@ -37,7 +37,7 @@ license:            GPL-2.0-or-later
 license-file:       LICENSE
 author:             Oleg Grenrus <oleg.grenrus@iki.fi>
 maintainer:         Oleg.Grenrus <oleg.grenrus@iki.fi>
-copyright:          (c) 2017-2019 Oleg Grenrus
+copyright:          (c) 2017-2021 Oleg Grenrus
 build-type:         Simple
 extra-source-files:
   ChangeLog.md
