Étienne Bouchard

**jquery-confirm version:** v3.x.x **I'm submitting a ...** (check one with "x") [ ] bug report [x ] feature request [ ] support request **Current behavior:** $.confirm is not a function....

Fixed a casting error on this pr : https://github.com/appsup-dart/firebase_admin/pull/13

Adding the missing Header attributes for Headers. Adding support for superscript. Adding support for subscript.