this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Anthony Fok <email@example.com>
Date: Wed Jan 2 01:54:01 2019 -0700
Build-depend on dh-golang (>= 1.31~) for handling testdata/*
The DH_GOLANG_INSTALL_EXTRA variable for installing testdata directories
is no longer necessary and thus removed from debian/rules.