docs(README): add Svelte badge (#975)

Signed-off-by: Michaël De Boey <[email protected]>

README.md

@@ -574,5 +574,6 @@ This project follows the [all-contributors](https://github.com/all-contributors/
 [badge-dom]: https://img.shields.io/badge/%F0%9F%90%99-DOM-black?style=flat-square
 [badge-angular]: https://img.shields.io/badge/-Angular-black?style=flat-square&logo=angular&logoColor=white&labelColor=DD0031&color=black
 [badge-react]: https://img.shields.io/badge/-React-black?style=flat-square&logo=react&logoColor=white&labelColor=61DAFB&color=black
+[badge-svelte]: https://img.shields.io/badge/-Svelte-black?style=flat-square&logo=svelte&logoColor=white&labelColor=FF3E00&color=black
 [badge-vue]: https://img.shields.io/badge/-Vue-black?style=flat-square&logo=vue.js&logoColor=white&labelColor=4FC08D&color=black
 [badge-marko]: https://img.shields.io/badge/-Marko-black?style=flat-square&logo=marko&logoColor=white&labelColor=2596BE&color=black