[libshumate] ci: Update Docker container

[Marcus Lundblad <mlundblad src gnome org>]

commit c3c18e29a3c74b8819a8d3dc0b211521ef049c61
Author: James Westman <james jwestman net>
Date:   Thu May 6 11:01:32 2021 -0500

    ci: Update Docker container

 .gitlab-ci.yml | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 266ddba..78a6f7d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,13 +4,11 @@ stages:
 
 fedora:
   stage: build
-  image: registry.gitlab.gnome.org/gnome/gtk/fedora-base:v28
+  image: registry.gitlab.gnome.org/gnome/gtk/fedora:v30
   script:
-    - dnf install -y vala sqlite-devel libsoup-devel gtk4-devel
+    - sudo dnf install -y vala sqlite-devel libsoup-devel gtk4-devel
     - meson _build -Db_coverage=true -Dgtk_doc=true
     - ninja -C _build shumate-doc
-    # make sure everything gets built, including VAPI, GIR, etc.
-    - ninja -C _build install
     - xvfb-run ninja -C _build test
     - ninja -C _build coverage
     - mv _build/docs/reference/html/ docs