[librsvg-oci-images] ci: fedora 30 as the image to bootstrap containers

[Jordan Petridis <jpetridis src gnome org>]

commit a967189eef1cee3b0f2d4a85d45178c40c053bc9
Author: Jordan Petridis <jpetridis gnome org>
Date:   Tue Aug 27 13:35:59 2019 +0300

    ci: fedora 30 as the image to bootstrap containers

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a21f809..a10a990 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: 'registry.fedoraproject.org/fedora:31'
+image: 'registry.fedoraproject.org/fedora:30'
 
 stages:
   - distro
@@ -6,7 +6,7 @@ stages:
 
 # Buildah can't use 'overlay' driver when running inside docker
 variables:
-  STORAGE_DRIVER: vfs
+  STORAGE_DRIVER: 'vfs'
 
 # Expects $IMAGE which should be the name+tag of the registry image.
 # Expects $DOCKERFILE variable which should be the path to the dockerfile