Add cargo geiger to README

Signed-off-by: joshmc <josh-mcc@tiscali.co.uk>

README.md

@@ -427,6 +427,7 @@ See also [A comparison of operating systems written in Rust](https://github.com/
 * [delta](https://crates.io/crates/git-delta) — A syntax-highlighter for git and diff output [![build badge](https://api.travis-ci.com/dandavison/delta.svg?branch=master)](https://travis-ci.com/dandavison/delta)
 * [dotenv-linter](https://github.com/dotenv-linter/dotenv-linter) — Linter for `.env` files [![build badge](https://github.com/dotenv-linter/dotenv-linter/workflows/CI/badge.svg?branch=master)](https://github.com/dotenv-linter/dotenv-linter/actions?query=workflow%3ACI+branch%3Amaster)
 * [frewsxcv/crate-deps](https://github.com/frewsxcv/crate-deps) — generates images of dependency graphs for crates hosted on crates.io
+* [geiger](https://github.com/rust-secure-code/cargo-geiger) — A program that list statistics related to usage of unsafe Rust code in a Rust crate and all its dependencies [![Build Status](https://dev.azure.com/cargo-geiger/cargo-geiger/_apis/build/status/rust-secure-code.cargo-geiger?branchName=master)](https://dev.azure.com/cargo-geiger/cargo-geiger/_build/latest?definitionId=1&branchName=master)
 * [git-journal](https://github.com/saschagrunert/git-journal/) — The Git Commit Message and Changelog Generation Framework [![build badge](https://api.travis-ci.org/saschagrunert/git-journal.svg?branch=master)](https://travis-ci.org/saschagrunert/git-journal)
 * [gstats](https://github.com/boonshift/gstats/) — command line tool to print a developer handy summary of all git repositories below current directory
 * [rust-lang/rustfix](https://github.com/rust-lang/rustfix)  — automatically applies the suggestions made by rustc