rustc-ap-serialize 149.0.0

Automatically published version of the package `serialize` in the rust-lang/rust repository from commit 5bf68db6ecda0dd4788311a41b5c763d35597c96 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish
docs.rs failed to build rustc-ap-serialize-149.0.0
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Support code for encoding and decoding types.