docs: add badges to README.md

README.md

@@ -1,7 +1,13 @@
 # SOCKS toolkit
+[![Build Status](https://github.com/onnovalkering/socksx/workflows/CI/badge.svg)](https://github.com/onnovalkering/socksx/actions)
+[![License: MIT](https://img.shields.io/github/license/onnovalkering/socksx.svg)](https://github.com/onnovalkering/socksx/blob/master/LICENSE)
+[![Coverage Status](https://coveralls.io/repos/github/onnovalkering/socksx/badge.svg)](https://coveralls.io/github/onnovalkering/socksx?branch=master)
+[![Crates.io](https://img.shields.io/crates/v/socksx)](https://crates.io/crates/socksx)
 
 A work-in-progress SOCKS toolkit for Rust. SOCKS5 ([rfc1928](https://tools.ietf.org/html/rfc1928)) and SOCKS6 ([draft-11](https://tools.ietf.org/html/draft-olteanu-intarea-socks-6-11)) are supported.
 
+[Documentation](https://docs.rs/socksx/latest)
+
 ## Python
 The `socksx-py` crate is a [PyO3](https://github.com/PyO3/PyO3)-based Python interface to `socksx`.