[gnome-sound-recorder/bilelmoussaoui/prepare-release] about: update authors & copyright

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit f8347f931d921eab3c69200a95d1bb4a4aeebeb2
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Fri Jun 12 22:28:44 2020 +0200

    about: update authors & copyright

 src/application.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/application.js b/src/application.js
index 05acbd7..99d332d 100644
--- a/src/application.js
+++ b/src/application.js
@@ -167,7 +167,9 @@ var Application = GObject.registerClass(class Application extends Gtk.Applicatio
                 'Garrett LeSage <garrettl gmail com>',
                 'Hylke Bons <hylkebons gmail com>',
                 'Sam Hewitt <hewittsamuel gmail com>'],
-            authors: ['Meg Ford <megford gnome org>'],
+            authors: ['Meg Ford <megford gnome org>',
+                'Bilal Elmoussaoui <bil elmoussaoui gmail com>',
+                'Felipe Borges <felipeborges gnome org>'],
             /* Translators: Replace "translator-credits" with your names, one name per line */
             translator_credits: _('translator-credits'),
             program_name: GLib.get_application_name(),
@@ -176,7 +178,7 @@ var Application = GObject.registerClass(class Application extends Gtk.Applicatio
             logo_icon_name: pkg.name,
             version: pkg.version,
             website: 'https://wiki.gnome.org/Apps/SoundRecorder',
-            copyright: `Copyright 2013-${new Gtk.Calendar().get_date()[0]} Meg Ford`,
+            copyright: 'Copyright 2013-2019 Meg Ford\nCopyright 2019-2020 Bilal Elmoussaoui & Felipe Borges',
             wrap_license: true,
             modal: true,
             transient_for: this.window,