rustc-ap-serialize 160.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit 8afb89493179e52b61a4f8b9c45de1dd7e9d1f3a The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.