feat: Update README badges (#287)

Author: Copilot

README.md

@@ -1,9 +1,16 @@
 # Casbin.js
 
-[![NPM version](https://img.shields.io/npm/v/casbin.js)](https://www.npmjs.com/package/casbin.js)
-[![Continuous integration](https://github.com/casbin/casbin.js/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/casbin/casbin.js/actions/workflows/ci.yml)
-[![codebeat badge](https://codebeat.co/badges/74b3febb-292f-4633-81df-3a76ea445cd8)](https://codebeat.co/projects/github-com-casbin-casbin-js-master)
-![Code size](https://img.shields.io/github/languages/code-size/casbin/casbin.js)
+[![GitHub Actions](https://github.com/casbin/casbin.js/workflows/build/badge.svg)](https://github.com/casbin/casbin.js/actions)
+[![Release](https://img.shields.io/github/release/casbin/casbin.js.svg)](https://github.com/casbin/casbin.js/releases/latest)
+[![NPM version][npm-image]][npm-url]
+[![NPM download][download-image]][download-url]
+[![install size](https://packagephobia.now.sh/badge?p=casbin.js)](https://packagephobia.now.sh/result?p=casbin.js)
+[![Discord](https://img.shields.io/discord/1022748306096537660?logo=discord&label=discord&color=5865F2)](https://discord.gg/S5UjpzGZjN)
+
+[npm-image]: https://img.shields.io/npm/v/casbin.js.svg?style=flat-square
+[npm-url]: https://npmjs.org/package/casbin.js
+[download-image]: https://img.shields.io/npm/dm/casbin.js.svg?style=flat-square
+[download-url]: https://npmjs.org/package/casbin.js
 
 Casbin.js is a frontend port of a backend Casbin service, which facilitates the manipulation, management and storage of the user permission in a frontend application.