Merge branch 'feature/opensuse-15-0' into 'master'

Drop openSUSE 15.0

See merge request !12

.gitlab-ci.yml

@@ -280,20 +280,3 @@ upload/openSUSE/15.1:
   <<: *upload
   dependencies:
     - build/opensuse/15.1
-
-build/opensuse/15.0:
-  <<: *build
-  variables:
-    DOCKER_IMAGE: opensuse/15.0
-
-test/opensuse/15.0:
-  <<: *test
-  variables:
-    DOCKER_IMAGE: opensuse/15.0
-  dependencies:
-    - build/opensuse/15.0
-
-upload/openSUSE/15.0:
-  <<: *upload
-  dependencies:
-    - build/opensuse/15.0