Update README.md

README.md

@@ -1,5 +1,8 @@
 # ipaddr.js
 
+[![GitHub Workflow Status][gh-actions-img]][github-actions]
+[![Codecov][codecov-badge]][codecov] [![][docs-badge]][docs]
+
 Deno port of [ipaddr.js](https://github.com/whitequark/ipaddr.js) library. Used by [proxy_addr](https://github.com/deno-libs/proxy_addr).
 
 ## Example
@@ -48,4 +51,11 @@ isValid('127.0.0.1') // true
 - [x] `range`
 - [ ] `subnetMatch`
 - [x] `toIPv4Address`
-- [x] `toRFC5952String`
+- [x] `toRFC5952String`
+
+[gh-actions-img]: https://img.shields.io/github/actions/workflow/status/deno-libs/ipaddr.js/main.yml?branch=master&style=for-the-badge&logo=github
+[codecov]: https://codecov.io/gh/deno-libs/ipaddr.js
+[github-actions]: https://github.com/deno-libs/ipaddr.js/actions
+[codecov-badge]: https://img.shields.io/codecov/c/gh/deno-libs/ipaddr.js?style=for-the-badge
+[docs-badge]: https://img.shields.io/github/v/release/deno-libs/ipaddr.js?color=yellow&label=Docs&logo=deno&style=for-the-badge
+[docs]: https://doc.deno.land/https/deno.land/x/ipaddr.js/mod.ts