[epiphany] Update about dialog copyright year

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 63f4ec4ef95e61a84a91ee1b047d0b01695d3805
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat Jan 6 12:56:50 2018 -0600

    Update about dialog copyright year

 src/window-commands.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/window-commands.c b/src/window-commands.c
index e035339..5c57aa1 100644
--- a/src/window-commands.c
+++ b/src/window-commands.c
@@ -653,7 +653,7 @@ window_cmd_show_about (GSimpleAction *action,
 #endif
                          "version", VERSION,
                          "copyright", "Copyright © 2002–2004 Marco Pesenti Gritti\n"
-                         "Copyright © 2003–2017 The Web Developers",
+                         "Copyright © 2003–2018 The Web Developers",
                          "artists", artists,
                          "authors", authors,
                          "comments", comments,