`std::time` is good enough for us here. `cookie` is using `time 0.3`,
but Servo can convert to standard library types when getting data from
`cookie`. This reduces our direct dependencies and removes more use of
the very old `time 0.1` series.
Signed-off-by: Martin Robinson <mrobinson@igalia.com>
hyper_serde changes very infrequently and typically only in order to
upgrade Servo dependencies. crates.io lists hyper_serde as having no
dependents, and its integration will not prevent releasing new versions.
Integrating it will both reduce the number of repositories we have to
maintain as well as making it easier to upgrade Servo dependencies.