Problems while searching for a new upstream version

package:
graphviz
severity:
high
created:
2018-04-20
last updated:
2019-07-15

uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
  https://gitlab.com/graphviz/graphviz/tags?sort=updated_desc .*stable_release_(\d\S+)/archive\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))