Bug#855808: Pending fixes for bugs in the prometheus package

[pkg-go-maintainers]

tag 855808 + pending
thanks

Some bugs in the prometheus package are closed in revision
cb72f3807cabc7526052540055056dd1b5890979 in branch 'debian/sid' by
Martín Ferrari

The full diff can be seen at
https://anonscm.debian.org/cgit/pkg-go/packages/prometheus.git/commit/?id=cb72f38

Commit message:

    Add version to libjs-mustache dependency. Closes: #855808.