[fix] ci file fix so that this repo builds the integration tests too.

.gitlab-ci.yml

@@ -4,7 +4,7 @@ stages:
 integration.test:
   stage: test
   script:
-    - ./integration.sh
+    - nix-shell -A test --run "./argotk.hs helloworld"
   except:
     - /^wip\/.*/
     - /^WIP\/.*/