[gnome-contacts] Add self to authors[]

[Niels De Graef <nielsdg src gnome org>]

commit b91c9b1e8f1c297acf2c8d7a508fd6293ad9e837
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Aug 22 10:51:45 2017 +0200

    Add self to authors[]

 src/contacts-app.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/contacts-app.vala b/src/contacts-app.vala
index 7ef41d2..5a7d1a2 100644
--- a/src/contacts-app.vala
+++ b/src/contacts-app.vala
@@ -123,7 +123,8 @@ public class Contacts.App : Gtk.Application {
   public void show_about () {
     string[] authors = {
       "Alexander Larsson <alexl redhat com>",
-      "Erick Pérez Castellanos <erick red gmail com>"
+      "Erick Pérez Castellanos <erick red gmail com>",
+      "Niels De Graef <nielsdegraef gmail com>"
     };
     string[] artists = {
       "Allan Day <allanpday gmail com>"