[gimp-help/wip/wormnest/ci] ci: add python3-libxml2 dependency

[Jacob Boerema <jboerema src gnome org>]

commit f35d36e7cc21879f64d9927bd6eaf86f6d020f64
Author: Jacob Boerema <jgboerema gmail com>
Date:   Wed Jun 2 18:13:04 2021 -0400

    ci: add python3-libxml2 dependency

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 88e8b1b8d..9749c03dd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -26,6 +26,8 @@ build-debian:
         pngcrush
         pngnq
         python3
+        python3-libxml2
+        python3-pip
         xsltproc
   script:
     - mkdir _build