Fixing tag activated package registration

.gitlab-ci-release.yml

@@ -16,6 +16,7 @@ register:
     - julia --project=. -e '
         using Pkg;
         Pkg.add("Registrator");
+        Pkg.add("RegistryTools");
         using Registrator;
         using RegistryTools;
         package_repo = ENV["PACKAGE_REPO"];