Add nutype to README

README.md

@@ -1019,6 +1019,7 @@ See also [About Rust’s Machine Learning Community](https://medium.com/@autumn_
 * [danielpclark/array_tool](https://github.com/danielpclark/array_tool) — Array helpers for Rust. Some of the most common methods you would use on Arrays made available on Vectors. Polymorphic implementations for handling most of your use cases.
 * [fizyk20/generic-array](https://github.com/fizyk20/generic-array) – a hack to allow for arrays sized by typenums
 * [garro95/priority-queue](https://github.com/garro95/priority-queue)[[priority-queue](https://crates.io/crates/priority-queue)] — A priority queue that implements priority changes.
+* [greyblake/nutype](https://github.com/greyblake/nutype) [[nutype](https://crates.io/crates/nutype)] — define newtype structures with validation constraints. [![build status](https://github.com/greyblake/nutype/actions/workflows/ci.yml/badge.svg)](https://github.com/greyblake/nutype/actions)
 * [mrhooray/kdtree-rs](https://github.com/mrhooray/kdtree-rs) — K-dimensional tree in Rust for fast geospatial indexing and nearest neighbors lookup
 * [orium/rpds](https://github.com/orium/rpds) [[rpds](https://crates.io/crates/rpds)] — Persistent data structures in Rust. [![build badge](https://github.com/orium/rpds/workflows/CI/badge.svg)](https://github.com/orium/rpds/actions?query=workflow%3ACI)
 * [RoaringBitmap/roaring-rs](https://github.com/RoaringBitmap/roaring-rs) – Roaring Bitmaps in Rust