Handle cargo package renames

[flodiebold]

We currently don't handle the case where a package is renamed in the Cargo.toml, e.g. in ra_analysis where ra_hir is imported as hir instead, so the name resolution fails there. I think this needs to be fixed in from_cargo_metadata in project_model.rs (the name of the PackageDependency should be the renamed name), but I'm not sure what's the correct way of getting this information from the cargo metadata.

[matklad]

This is fixed in https://github.com/rust-analyzer/rust-analyzer/tree/new-metadata and waits for oli-obk/cargo_metadata#59.

Guess I'll just merge that with the patch

[flodiebold]

Ah, great :)