add some more badges

Author: Roguelazer

README.md

@@ -1,6 +1,8 @@
 This is a small Rust application for managing database migrations for MySQL.
 
 [![CI](https://github.com/EasyPost/rmmm/workflows/CI/badge.svg?branch=master)](https://github.com/EasyPost/rmmm/actions/workflows/ci.yml)
+[![Crates.io](https://img.shields.io/crates/v/rmmm)](https://crates.io/crates/rmmm)
+[![Crates.io](https://img.shields.io/crates/l/rmmm)](LICENSE.txt)
 
 It compiles into a single binary called `rmmm`.