This patch updates the `RUSTSEC-2019-0028` advisory to show a patched
version is available. The patch was added [in PR 5554](https://github.com/google/flatbuffers/pull/5554),
and released with version `0.6.1`.
As announced in #228, this commit migrates all advisories to the new V2
format, which splits version information into a separate section, and
now has a structure which corresponds to the internal code structure of
the `rustsec` crate.
This is a breaking change for users of `cargo-audit` < 0.9, and anyone
who has written a 3rd party advisory format parser.
