Add fleet-rs to build system

README.md

@@ -477,7 +477,7 @@ See also [A comparison of operating systems written in Rust](https://github.com/
 * [synth](https://github.com/getsynth/synth) — A declarative data generation engine.
 
 ### Build system
-
+* [Fleet](https://fleet.rs) [[fleet-rs](https://crates.io/crates/fleet-rs)] - The blazing fast build tool for Rust.
 * [Cargo](https://crates.io/) — the Rust package manager
   * [cargo-all-features](https://github.com/frewsxcv/cargo-all-features) - A configurable subcommand to simplify testing, building and much more for all combinations of features [![CI](https://github.com/frewsxcv/cargo-all-features/actions/workflows/ci.yml/badge.svg)](https://github.com/frewsxcv/cargo-all-features/actions/workflows/ci.yml)
   * [cargo-benchcmp](https://crates.io/crates/cargo-benchcmp) — A utility to compare Rust micro-benchmarks [![build badge](https://api.travis-ci.org/BurntSushi/cargo-benchcmp.svg?branch=master)](https://travis-ci.org/BurntSushi/cargo-benchcmp)