pub fn set_resolver(&mut self, resolver: CargoResolverVersion) -> &mut Self {
        self.resolver = resolver;
        self
    }
Sets the Cargo resolver version.

By default, `HakariBuilder` uses [version 2](CargoResolverVersion::V2) of the Cargo
resolver. For more about Cargo resolvers, see the documentation for
[`CargoResolverVersion`](CargoResolverVersion).
tools/hakari/src/hakari.rs