rustc-ap-serialize 592.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit 3e3e06dfdd2a5c601ae69be7558c1a9fbf4f32d8 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish

Support code for encoding and decoding types.