[vte/wip/sixels: 73/82] sixel: Update copyright notice

[Hans Petter Jansson <hansp src gnome org>]

commit e3cd2763db253c419e9c77131b439d8f69c16f02
Author: Hans Petter Jansson <hpj cl no>
Date:   Fri Jun 26 01:02:58 2020 +0200

    sixel: Update copyright notice

 src/sixel.cc | 3 ++-
 src/sixel.h  | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/sixel.cc b/src/sixel.cc
index ad3264a5..8b6176c8 100644
--- a/src/sixel.cc
+++ b/src/sixel.cc
@@ -1,5 +1,6 @@
 /*
- * Copyright (C) Hayaki Saito
+ * Copyright © 2016-2020 Hayaki Saito
+ * Copyright © 2020 Hans Petter Jansson
  * originally written by kmiya@cluti (https://github.com/saitoha/sixel/blob/master/fromsixel.c)
  *
  * This library is free software; you can redistribute it and/or
diff --git a/src/sixel.h b/src/sixel.h
index 2b23cecc..704dd029 100644
--- a/src/sixel.h
+++ b/src/sixel.h
@@ -1,5 +1,6 @@
 /*
- * Copyright (C) Hayaki Saito
+ * Copyright © 2016-2020 Hayaki Saito
+ * Copyright © 2020 Hans Petter Jansson
  * originally written by kmiya@cluti (https://github.com/saitoha/sixel/blob/master/fromsixel.c)
  *
  * This library is free software; you can redistribute it and/or