Problems while searching for a new upstream version

package:
golang-github-mwitkow-go-conntrack
severity:
high
created:
2017-12-10
last updated:
2019-03-22

uscan had problems while searching for a new upstream version:
In debian/watch no matching files for watch line
  https://github.com/mwitkow/go-conntrack/tags .*/v?(\d\S*)\.tar\.gz