rustc-ap-rustc_cratesio_shim 284.0.0

Automatically published version of the package `rustc_cratesio_shim` in the rust-lang/rust repository from commit 5eda136f622f9cbfe706e775fcaa3a0169fd4ae1 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish