up CI again

.gitlab-ci.yml

@@ -70,7 +70,7 @@ release-r:
     paths:
       - "$(ls -rt landsepiDev_* |tail -1)"
   rules:
-    - if: $CI_COMMIT_TAG != ""
+    - if: $CI_COMMIT_TAG != null
   dependencies:
     - r-build_test
 
@@ -86,7 +86,7 @@ release-win:
     paths:
       - "$(ls -rt landsepiDev_*.zip |tail -1)"
   rules:
-    - if: $CI_COMMIT_TAG != ""
+    - if: $CI_COMMIT_TAG != null
   dependencies:
     - r-windows-build_test
 
@@ -101,7 +101,7 @@ release-Mac:
     paths:
       - "$(ls -rt landsepiDev_*.tgz | tail -1)"
   rules:
-    - if: $CI_COMMIT_TAG != ""
+    - if: $CI_COMMIT_TAG != null
   dependencies:
     - r-Mac-build_test