Merge pull request #1203 from tnballo/master

Add scapegoat to data structures

README.md

@@ -973,6 +973,7 @@ See also [About Rust’s Machine Learning Community](https://medium.com/@autumn_
 * [orium/rpds](https://github.com/orium/rpds) [[rpds](https://crates.io/crates/rpds)] — Persistent data structures in Rust. [![build badge](https://api.travis-ci.org/orium/rpds.svg?branch=master)](https://travis-ci.org/orium/rpds)
 * [RoaringBitmap/roaring-rs](https://github.com/RoaringBitmap/roaring-rs) – Roaring Bitmaps in Rust
 * [rust-itertools/itertools](https://github.com/rust-itertools/itertools) — [![build badge](https://api.travis-ci.org/rust-itertools/itertools.svg?branch=master)](https://travis-ci.org/rust-itertools/itertools)
+* [tnballo/scapegoat](https://github.com/tnballo/scapegoat) [[scapegoat](https://crates.io/crates/scapegoat)] — Safe, fallible, stack-only alternative to `BTreeSet` and `BTreeMap`. [![GitHub Actions](https://github.com/tnballo/scapegoat/workflows/test/badge.svg?branch=master)](https://github.com/tnballo/scapegoat/actions)
 * [xfix/enum-map](https://github.com/xfix/enum-map) [[enum-map](https://crates.io/crates/enum-map)] — An optimized map implementation for enums using an array to store values. [![build badge](https://api.travis-ci.org/xfix/enum-map.svg?branch=master)](https://travis-ci.org/xfix/enum-map)
 
 ### Data visualization