[gimp-help/wip/wormnest/ci] ci: add python3 as dependency

[Jacob Boerema <jboerema src gnome org>]

commit 6e57d69bff6cfc2aa5e328e59fcaa7c5ff01cce7
Author: Jacob Boerema <jgboerema gmail com>
Date:   Wed Jun 2 17:49:41 2021 -0400

    ci: add python3 as dependency

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 411c9f467..88e8b1b8d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -25,6 +25,7 @@ build-debian:
         pkg-config
         pngcrush
         pngnq
+        python3
         xsltproc
   script:
     - mkdir _build