Références
https://github.com/audreyr/favicon-cheat-sheet
https://sympli.io/blog/2017/02/15/heres-everything-you-need-to-know-about-favicons-in-2017/
https://www.keycdn.com/blog/make-a-favicon/
https://kinsta.com/knowledgebase/wordpress-favicon/
https://www.billerickson.net/wordpress-site-icon-with-genesis/
https://www.beliefmedia.com.au/favicons-wordpress
https://codex.wordpress.org/Creating_a_Favicon
https://make.wordpress.org/core/2015/07/27/site-icon/