GitLab: Allow fetching events

Projects that are linked to a GitLab instance will now fetch
notifications for this project and print them to the vcs output pane.

Change-Id: Ifb960e64b30a260327efb28a3dfd26f6457503a0
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/gitlab/queryrunner.h

@@ -40,7 +40,8 @@ public:
         NoQuery,
         User,
         Project,
-        Projects
+        Projects,
+        Events
     };
 
     explicit Query(Type type, const QStringList &parameters = {});