rustc-ap-rustc_cratesio_shim 273.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit f42c510f2f952a6eba80e6448b46e83bfcc04e44 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish