rustc-ap-rustc_lint_defs 721.0.0

Automatically published version of the package `rustc_lint_defs` in the rust-lang/rust repository from commit d568d63b1f9f5fc47e4202e2a2a84142ff6202d8 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish