gitlab-ci: switch to v2019pre branch

Need to generate the recent version of tests description for QA!

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

.gitlab-ci.yml

@@ -13,7 +13,7 @@ test:
     paths:
       - test
   except:
-    - apertis/v2019dev0
+    - apertis/v2019pre
 
 pages:
   stage: deploy
@@ -23,4 +23,4 @@ pages:
     paths:
       - public
   only:
-    - apertis/v2019dev0
+    - apertis/v2019pre