Added MSRV and zero-procent-unsafe badge to Cargo.toml

README.md

@@ -3,6 +3,9 @@
 [![Crates.io](https://img.shields.io/crates/v/rtcm-rs.svg)](https://crates.io/crates/rtcm-rs)
 [![MIT/Apache 2.0](https://img.shields.io/badge/license-MIT%2FApache-blue.svg)](https://github.com/martinhakansson/rtcm-rs#license)
 [![CI](https://github.com/martinhakansson/rtcm-rs/workflows/CI/badge.svg)](https://github.com/martinhakansson/rtcm-rs/actions)
+![Minimum Rust Version](https://img.shields.io/badge/Min%20Rust-1.66-green.svg)
+
+![Unsafe-Zero-Percent](https://img.shields.io/badge/Unsafety-0%25-brightgreen.svg)
 
 rtcm-rs is a powerful Rust library for decoding and encoding RTCM version 3 messages as defined in the RTCM Standard 10403.x. As of now, it supports a subset of the messages in the standard, but work is being done to cover them all in the near future.