add package as artifact

.gitlab-ci.yml

@@ -8,4 +8,6 @@ test:
     # run check
     - PKG_FILE_NAME=$(ls -1t *.tar.gz | head -n 1)
     - R CMD check "${PKG_FILE_NAME}"  --no-manual --as-cran
-    
\ No newline at end of file
+  artifacts:
+    paths:
+    - PKG_FILE_NAME