rustc-ap-rustc_cratesio_shim 281.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit fb2446ad581c9d54b9b4dce1106ad9138438a2ef The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish