"file not included in module tree" is reported after changing the case of filename

NOTE: This is a VSCode issue on case insensitive file systems, a workaround fix is described in this comment

I'm using VSCode with rust-analyzer 0.2.710 on Windows 10.

To reproduce:

1. Create a new rust project
2. Create A.rs under src
3. Rename A.rs to a.rs
4. Add mod a; to main.rs
5. In a.rs it reports file not included in module tree and IntelliSense is disabled.

Restart VSCode doesn't solve the issue. How can I clear the cache of rust-analyzer?

Reproduce on Windows with a Rust project by renaming src/A.rs to src/a.rs and adding mod a; to main.rs. Start by checking how rust-analyzer and VSCode handle the renamed file and module tree. Done means a.rs is included and IntelliSense works without restarting VSCode or relying on the linked workaround.