Update README.md

README.md

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 [![Travis](https://img.shields.io/travis/GabrielDuarteM/webplayer-hotkeys/master.svg)](https://travis-ci.org/GabrielDuarteM/webplayer-hotkeys)
 [![bitHound Dev Dependencies](https://img.shields.io/bithound/devDependencies/github/GabrielDuarteM/Webplayer-Hotkeys.svg)](https://www.bithound.io/github/GabrielDuarteM/Webplayer-Hotkeys/master/dependencies/npm)
 [![styled with prettier](https://img.shields.io/badge/styled_with-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](http://makeapullrequest.com)
+
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/RkdEqExiEGhtxGZTKJW3uDnk/GabrielDuarteM/webplayer-hotkeys'>
+  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/RkdEqExiEGhtxGZTKJW3uDnk/GabrielDuarteM/webplayer-hotkeys.svg' />
+</a>
 
 A Chrome extension that assigns hotkeys to play/pause, and to switch music (next and previous). If no player is currently opened, it fires up Spotify.