Please allow for local packages to be specified for dependencies.

We do not allow network access during builds so we must sometimes use local package dependencies in the Packages.swift file.

These can be added like this in the Packages.swift file
.package(name: "my-api-client", path: "../my-api-client")

This could be accomplished by using a file url, then just using the lastPathComponent as the name, and the url.path for the path.

The version requirement would then be excluded.