Support for Webp File Uploads

[djnatedagreat]

Hello,

Thoughts on allowing uploads of the webp file format?

Specifically, I'd like our installation to support webp file uploads.

Please note the following code reference that does not include webp:

mosaico/src/js/bindings/fileupload.js

Line 104 in a277147

acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,