pub fn other_options(
        &mut self,
        options: impl IntoIterator<Item = impl Into<String>>,
    ) -> &mut Self {
        self.inner
            .other_options(options.into_iter().map(|s| s.into()).collect::<Vec<_>>());
        self
    }
Arbitrary flags to pass to `cargo metadata`. These will be added to the end of the
command invocation.

Note that `guppy` internally:
* uses `--format-version 1` as its metadata format.
* passes in `--all-features`, so that `guppy` has a full view of the dependency graph.

Attempting to override either of those options may lead to unexpected results.
guppy/src/metadata_command.rs