Getting "failed to load source for a dependency" when it's specified by "path" #47

🐛 Bug description

When I do sls deploy with this in my Cargo.toml:

headless_chrome = {path = "../headless_chrome/"}

I get this error: https://gist.github.com/atroche/661d7b0df67889635e44317fafb6ec48

And I've also tried changing that path to be absolute.

When I change that line to

headless_chrome = "0.9.0"

Then sls deploy succeeds.

🤔 Expected Behavior

It should've built and deployed without an error.

👟 Steps to reproduce

Change a dependency to point to a local crate, then do sls deploy.

🌍 Your environment

Your Environment Information ---------------------------
Operating System: linux
Node Version: 10.15.3
Framework Version: 1.51.0
Plugin Version: 1.3.10
SDK Version: 2.1.0