Add postcard #HSFDPMUW

https://crates.io/crates/postcard

README.md

@@ -1132,6 +1132,7 @@ See also [About Rust’s Machine Learning Community](https://medium.com/@autumn_
   * [alex/rust-asn1](https://github.com/alex/rust-asn1) — A Rust ASN.1 (DER) serializer [![build badge](https://api.travis-ci.org/alex/rust-asn1.svg?branch=master)](https://travis-ci.org/alex/rust-asn1)
 * Binary
   * [bincode-org/bincode](https://github.com/bincode-org/bincode) — A binary encoder/decoder in Rust [![CI](https://github.com/bincode-org/bincode/actions/workflows/rust.yml/badge.svg?branch=trunk)](https://github.com/bincode-org/bincode/actions/workflows/rust.yml)
+  * [jamesmunns/postcard](https://github.com/jamesmunns/postcard) [[postcard](https://crates.io/crates/postcard)] — Postcard is a #![no_std] focused serializer and deserializer for Serde.
   * [m4b/goblin](https://github.com/m4b/goblin) [[goblin](https://crates.io/crates/goblin)] —  cross-platform, zero-copy, and endian-aware binary parsing [![build badge](https://api.travis-ci.org/m4b/goblin.svg?branch=master)](https://travis-ci.org/m4b/goblin)
 * BSON
   * [mongodb/bson-rust](https://github.com/mongodb/bson-rust) — Encoding and decoding support for BSON in Rust