gskit: update the copyright year range

Follow-up from 083603c63a3

diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index 2f558479b76116a6077dd485dc9f7d4f9fde3f93..b0864b5fada5bed5d3e43da0ab1324af61408f02 100644 (file)
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms