[four-in-a-row] ci: add nightly job

[Jordan Petridis <jpetridis src gnome org>]

commit 36f01f76356e05fbb46736f3c3a41016ccca48bf
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Aug 2 14:55:26 2020 +0000

    ci: add nightly job

 .gitlab-ci.yml | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 605ee24..9a50d07 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,3 +11,8 @@ flatpak:
         RUNTIME_REPO: "https://sdk.gnome.org/gnome-nightly.flatpakrepo";
         APP_ID: "org.gnome.Four-in-a-row"
     extends: .flatpak
+
+nightly:
+    extends: '.publish_nightly'
+    dependencies: ['flatpak']
+    needs: ['flatpak']