docs(readme): replace shields badges with badgen

https://badgen.net/

Signed-off-by: Mark <remarkablemark@users.noreply.github.com>

Author: remarkablemark

README.md

@@ -2,11 +2,11 @@
 
 [![NPM](https://nodei.co/npm/html-react-parser.png)](https://nodei.co/npm/html-react-parser/)
 
-[![NPM version](https://img.shields.io/npm/v/html-react-parser.svg)](https://www.npmjs.com/package/html-react-parser)
-[![Bundlephobia minified + gzip](https://img.shields.io/bundlephobia/minzip/html-react-parser)](https://bundlephobia.com/package/html-react-parser)
+[![NPM version](https://badgen.net/npm/v/html-react-parser)](https://www.npmjs.com/package/html-react-parser)
+[![Bundlephobia minified + gzip](https://badgen.net/bundlephobia/minzip/html-react-parser)](https://bundlephobia.com/package/html-react-parser)
 [![Build Status](https://github.com/remarkablemark/html-react-parser/workflows/build/badge.svg?branch=master)](https://github.com/remarkablemark/html-react-parser/actions?query=workflow%3Abuild)
 [![codecov](https://codecov.io/gh/remarkablemark/html-react-parser/branch/master/graph/badge.svg?token=wosFd1DBIR)](https://codecov.io/gh/remarkablemark/html-react-parser)
-[![NPM downloads](https://img.shields.io/npm/dm/html-react-parser.svg?style=flat-square)](https://www.npmjs.com/package/html-react-parser)
+[![NPM downloads](https://badgen.net/npm/dm/html-react-parser)](https://www.npmjs.com/package/html-react-parser)
 [![Discord](https://img.shields.io/discord/422421589582282752.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://discord.gg/njExwXdrRJ)
 
 HTML to React parser that works on both the server (Node.js) and the client (browser):