ci: Update container to Fedora 28

We're going to need updated dependencies that we cannot build as
subprojects, like wayland-protocols.

diff --git a/.gitlab-ci/Dockerfile b/.gitlab-ci/Dockerfile
index eaa0e6153d3d9a53a0b65a50b987060ecf785b3c..84005c8324a79f469d81f22c52ed524f0234f43a 100644 (file)
--- a/.gitlab-ci/Dockerfile
+++ b/.gitlab-ci/Dockerfile
@@ -1,4 +1,4 @@
-FROM fedora:27
+FROM fedora:28
 
 RUN dnf -y install \
     adwaita-icon-theme \