[Pkg-rust-maintainers] Bug#1024086: Bug#1024086: rust-zip: please upgrade to v0.6

[Peter Green]

> Please upgrade to v0.6, needed by projects I am preparing for Debian.

Unfortunately upstream do not seem to provide a changelog.

There seem to be three reverse dependencies, elan, rust-grcov and
rust-coreutils.

elan upstream still seem to be on zip 0.5
coreutils and grcov upstreams bumped the dependency without any code changes.

Unfortunately there are issues with grcov and debcargo right now, hopefully
we will get an updated version of cargo/debcargo in Debian soon which will
fix this.